Most guys can tell you exactly when their car needs new tires, but ask them what a healthy testicle is supposed to feel like and you'll get a long pause and a change of subject. That's a problem.

Only about one in five men have even heard of a testicular self-exam. Almost half of male doctors have never done one on themselves. Testicular cancer is the most common solid tumor in men between 15 and 40. Over half of men with diabetes deal with erectile problems. And the average gap between a man first noticing a symptom and finally getting it diagnosed runs 12 to 15 weeks of denial, Googling, and hoping it goes away on its own.

This is the owner's manual that should have come with you at birth. What can go wrong, how to spot it early, how doctors fix it, and how to talk about it without wanting to disappear into the wallpaper. Nothing in here is too embarrassing to discuss. Your body isn't weird. You're not weird. And the doctor has, trust me, seen it all before lunch.

Part One: The Testicles

Picture your testicles as a small two product factory. One assembly line makes sperm. The other makes testosterone, the hormone responsible for muscle, bone strength, mood, energy, sex drive, and the general feeling of being yourself. When the factory has trouble, both product lines can take a hit. Knowing what is normal down there is the first step in catching problems early.

Testicular Cancer: The Cancer That Hits Young Men

This one deserves the spotlight, especially if you are between 15 and 40 years old.

What It Is.

Testicular cancer is the most common solid cancer in young men. About 10,000 new cases are diagnosed every year in the United States. Here is the good news that almost nobody hears: it is also one of the most curable cancers we know about, with a 99% five year survival rate when caught early. That number is not a typo. Catching it early means you almost certainly beat it.

Who Gets It and Why.

Doctors do not know exactly what causes testicular cancer, but some things raise your risk:

• Having a testicle that did not descend properly as a child (cryptorchidism), even if surgery fixed it later

• A father or brother who had testicular cancer

• Already having had testicular cancer on the other side

• Klinefelter syndrome or other genetic conditions

• Infertility

• Marijuana use

• Being tall (yes, really, though the link is small)

• Exposure to certain chemicals while your mother was pregnant with you

White men are four to five times more likely to develop testicular cancer than Black or Asian American men.

How to Spot It.

The classic warning sign is a painless, hard lump on one testicle. It often feels like a small marble or pea stuck to the surface. About 85% of the time there is no pain at all, which is part of what makes it so easy to ignore. Other things to watch for:

• A feeling of heaviness in the scrotum

• A dull ache in the lower belly or groin

• Sudden fluid buildup in the scrotum

• Breast tenderness or growth (some tumors make hormones)

• Back pain (if it has spread to lymph nodes)

The Monthly Self Exam: Sixty Seconds That Could Save Your Life.

This is the single most important habit in this entire guide. Do it once a month. It takes less time than brushing your teeth, and it costs nothing.

Do it during or right after a warm shower, when the scrotal skin is loose and relaxed.

1. Stand in front of a mirror. Look for any swelling on the skin of the scrotum.

2. Hold one testicle between the thumbs and fingers of both hands.

3. Gently roll it between your fingers. A healthy testicle feels smooth and oval, like a peeled hard boiled egg. It is totally normal for one to be slightly larger or to hang a bit lower than the other.

4. Find the epididymis, the soft tube like structure behind the testicle. That is supposed to be there. Do not panic and call it a lump.

5. Repeat on the other side.

6. If you feel anything hard, lumpy, or different from last month, see a doctor. Do not wait. Do not Google for three weeks first.

A Note on Screening.

The U.S. Preventive Services Task Force currently recommends against routine screening of guys with no symptoms, because the disease is rare and the cure rate is high. A lot of urologists disagree, pointing out that the average time between a man first noticing a symptom and finally getting diagnosed is 12 to 15 weeks. The European Association of Urology recommends self exams for men with risk factors. Either way, knowing your own anatomy takes one minute a month. No insurance company is going to bill you for that.

What Doctors Mistake It For.

Testicular cancer sometimes gets mistaken for epididymitis (an infection), a hydrocele (a harmless fluid pocket), or a simple cyst. The rule is simple: any solid lump inside the testicle is cancer until proven otherwise. Ultrasound can find lesions as small as 2 to 3 millimeters with over 90% accuracy, so the test is excellent.

Diagnosis Workup.

If a lump is found, doctors typically order:

• A scrotal ultrasound

• Blood tests for tumor markers (AFP, beta hCG, and LDH)

• If cancer is confirmed, a CT scan of the chest, belly, and pelvis

Treatment.

Step one is almost always a radical inguinal orchiectomy, which is a fancy way of saying the affected testicle is removed through a small cut in the groin (not the scrotum). This is both diagnostic and treatment in one move. After that, what comes next depends on the stage:

• Stage I (localized): Often just careful monitoring, called surveillance. Some patients get one or two rounds of chemotherapy.

• Stage II (spread to lymph nodes): Chemotherapy, radiation, or surgery to remove lymph nodes.

• Stage III (widespread): Chemotherapy, usually a regimen called BEP (bleomycin, etoposide, cisplatin).

Conversations Worth Having Before Treatment.

• Sperm banking: Chemo and radiation can damage fertility. Banking sperm before treatment is strongly recommended if you might ever want kids.

• Testicular prosthesis: A silicone implant can be placed for cosmetic reasons. Totally optional.

• Testosterone: Losing one testicle usually does not cause low testosterone because the other one picks up the slack. Levels should still be checked.

• Mental health: Anxiety, depression, body image issues, and relationship stress are all common after a testicular cancer diagnosis. These are real medical issues that deserve real attention.

The Bottom Line.

Testicular cancer is highly curable. The biggest enemy is delay. If something feels off, get it checked. Lance Armstrong won the Tour de France seven times after his testicular cancer treatment, just for some perspective.

Testicular Torsion: The Six Hour Emergency

What It Is.

The testicle twists on its own spermatic cord, cutting off its blood supply. Imagine a garden hose getting kinked. Now imagine that hose is attached to a very sensitive part of you. That is testicular torsion.

Who Gets It.

Most common in boys aged 12 to 18, but it can happen at any age, even in newborns.

How to Spot It.

Sudden, severe, one sided pain in the scrotum, often with nausea and vomiting. The testicle may sit higher than normal or appear rotated sideways. The cremasteric reflex, where the testicle pulls up when you stroke the inner thigh, is usually missing.

Why You Cannot Wait.

🚨 Sudden severe one-sided testicular pain is an emergency. Go to the ER now.

• Within 6 hours: the testicle can be saved about 90% of the time.

• At 12 hours: 50%.

• At 24 hours: 10%.

This is one of the few situations where minutes literally matter. If you're reading this while in pain, stop reading and go.

What It Gets Confused With.

Epididymitis. The big difference: torsion comes on suddenly and severely, while epididymitis builds up gradually. When in doubt, go to the emergency room. Better to feel a little silly than to lose a testicle.

Treatment.

Emergency surgery to untwist the testicle and stitch it in place (orchiopexy). The other testicle usually gets stitched too, since whatever made the first one twist could affect the second one.

Epididymitis: The Infection Behind the Testicle

What It Is.

Inflammation of the epididymis, the coiled tube behind the testicle that stores and transports sperm. It is one of the most common causes of scrotal pain in adult men.

What Causes It.

• In men under 35: Usually sexually transmitted infections (chlamydia or gonorrhea).

• In men over 35: Usually bacteria from the urinary tract, like E. coli.

• Other triggers: A heart medication called amiodarone, long hours of sitting, lots of bicycle riding, or anatomical quirks in the urinary tract.

How to Spot It.

Gradual onset of pain on one side, swelling, warmth, and redness. Pain often improves when the testicle is lifted (this is called a positive Prehn sign). Fever and urinary symptoms are common too.

Treatment.

Antibiotics aimed at the likely cause, pain medication, scrotal support (athletic supporter), ice packs, and rest. Most cases clear up in one to two weeks.

What It Gets Confused With.

Testicular torsion (the dangerous one) or testicular cancer. An ultrasound with Doppler can tell them apart by showing increased blood flow in epididymitis versus decreased flow in torsion.

Varicocele: The Bag of Worms

What It Is.

Enlarged veins in the scrotum, kind of like varicose veins in the legs. Found in about 15% of all men and up to 35% of men with fertility problems. The name is dramatic, but the condition is usually not.

Why the Left Side.

About 85 to 90% of varicoceles happen on the left because of how the veins drain on that side. A varicocele only on the right side is unusual and should be checked, because it could mean something is pressing on the vein further up.

How to Spot It.

Often found by accident. Bigger ones feel exactly like a bag of worms above the testicle and get larger when you stand up or strain. Some guys feel a dull ache or heaviness.

Does It Need Treatment?.

Most do not. Treatment is considered when there is pain or fertility concerns. A 2021 Cochrane review found it is still uncertain whether fixing a varicocele in subfertile men actually leads to more live births. So this is a discussion to have with a urologist if it is causing problems.

Hydrocele: The Water Balloon

What It Is.

A painless fluid pocket around the testicle. The scrotum looks swollen but does not hurt.

How to Tell.

A hydrocele will glow when a flashlight is shined through it in a dark room (called transillumination). A solid mass will not glow. This is a real thing doctors do.

Treatment.

Most hydroceles in adults are harmless and can be left alone. If they get big or uncomfortable, a urologist can drain them or repair them surgically. A new hydrocele in an adult should always get an ultrasound to make sure there is not a hidden tumor or infection underneath it.

Torsion of the Testicular Appendage

What It Is.

A tiny, useless leftover from embryonic development at the top of the testicle twists on itself. About 85% of boys have this little remnant.

How to Spot It.

Gradual pain at the top of the testicle. Sometimes you can see a small blue dot through the scrotal skin, called (creatively) the blue dot sign. This is uncommon but classic when present.

Treatment.

Pain medication and rest. It heals on its own in about a week. The main thing doctors want to do is rule out real testicular torsion with an ultrasound.

Part Two: The Penis

Erectile Dysfunction: More Common Than Most Men Realize

What It Is.

The repeated inability to get or keep an erection good enough for satisfying sex.

How Common.

ED affects roughly 30 million men in the United States. It gets more common with age but is not an unavoidable part of getting older. About 52% of men with diabetes deal with it.

What Causes It.

ED is usually a plumbing issue, a wiring issue, a hormone issue, or a head issue, and often more than one at the same time:

• Plumbing (most common): Atherosclerosis, high blood pressure, high cholesterol, diabetes, smoking. Blood cannot get in or stay in.

• Wiring: Spinal cord injuries, multiple sclerosis, nerve damage from surgery (especially prostate surgery).

• Hormones: Low testosterone, thyroid problems, high prolactin.

• Head: Anxiety, depression, relationship stress, performance worry.

• Medications: Beta blockers, certain water pills, antidepressants (especially SSRIs), opioids, antiandrogens, some antipsychotics.

Why It Matters Beyond the Bedroom.

This is huge. ED in a guy under 60 is one of the strongest warning signs of a future heart attack or stroke. The blood vessels in the penis are smaller than those in the heart, so they clog first. Think of ED as a free early warning system for heart disease. Pay attention.

Diagnosis.

A careful history and physical exam are the foundation. Lab tests usually include fasting glucose, a cholesterol panel, and morning testosterone. Specialized tests like penile ultrasound are saved for tricky cases.

Treatment, Step by Step.

Step One: Lifestyle (first, always, no exceptions)

• Regular exercise (150 minutes a week of moderate activity)

• Weight loss if you are carrying extra pounds (even modest weight loss makes a real difference)

• A Mediterranean style diet (fruits, vegetables, whole grains, olive oil, fish, nuts)

• Quitting smoking

• Cutting back on alcohol

• Getting better sleep

• Managing stress

Step Two: Pills (the PDE5 inhibitors)

These are the first line drug treatments and they work in 60 to 65% of men:

• Sildenafil (Viagra): Take 30 to 60 minutes before sex, ideally on an empty stomach. Lasts 4 to 6 hours.

• Tadalafil (Cialis): Can be taken daily (2.5 to 5 mg) or as needed (10 to 20 mg). Lasts up to 36 hours. Food does not bother it much.

• Vardenafil (Levitra): Similar to sildenafil. High fat meals reduce how well it works.

• Avanafil (Stendra): Fastest acting (15 to 30 minutes).

Common side effects include headache, flushing, stuffy nose, and indigestion.

🚫 Never combine PDE5 inhibitors with nitrate medications.

Nitroglycerin, isosorbide, and similar nitrates taken with sildenafil, tadalafil, vardenafil, or avanafil can drop your blood pressure to dangerous, even deadly, levels. This combination has killed people. If you have heart disease, you need clearance from a cardiologist before starting any PDE5 inhibitor.

Step Three: If Pills Do Not Work

• Injections (alprostadil): Yes, into the side of the penis. It sounds much worse than it is. Works in about 85% of men who do not respond to pills.

• Urethral suppositories (MUSE): A tiny pellet placed into the opening of the urethra.

• Vacuum erection devices: A plastic cylinder and a pump that pulls blood into the penis, held by a constriction ring. No medication.

• Penile implant: A surgically placed device. The inflatable type has satisfaction rates over 90%. This is the last resort but also the most reliable option.

Foods and Supplements With Real Evidence.

• A Mediterranean diet is linked to better erections and a healthier heart at the same time. Two birds.

• Zinc and vitamin D may help if you are low.

• L arginine has modest evidence.

• Red ginseng has shown small benefits in some studies but not enough for a formal recommendation.

• Avoid "male enhancement" supplements sold online. Many secretly contain prescription drugs at unpredictable doses, and people have died from the resulting interactions. This is not an exaggeration.

⚠️ "Natural" male-enhancement supplements have killed people. FDA testing has repeatedly found that pills sold as herbal blends actually contain hidden, unlabeled doses of sildenafil or tadalafil — sometimes at multiples of the prescription strength. When those interact with nitrates, heart conditions, or other medications, the consequences range from severe hypotension to fatal cardiac events. If you need a PDE5 inhibitor, get the real one from a doctor.

Medications That Can Make ED Worse.

• Beta blockers (older ones like atenolol and propranolol are the worst)

• Thiazide diuretics

• SSRIs and SNRIs (antidepressants)

• Spironolactone

• Opioids

• Antiandrogens used for prostate cancer

• Some antipsychotics

• Finasteride and dutasteride (for hair loss and prostate)

• Heavy alcohol use

If a medication seems to be the problem, talk to your doctor about alternatives. Do not just stop taking it.

How to Bring It Up.

This is the part most guys dread. Try one of these:

• "I am having trouble with erections and want to talk about it."

• "I read that erectile problems can be a warning sign for heart disease. Can we check?"

• "My partner and I are having some difficulties. What can we do?"

Doctors hear this every single day. It is as routine to them as taking your blood pressure. There is no judgment, just solutions.

Peyronie's Disease: The Bent Truth

What It Is.

Scar tissue (called plaque) forms inside the penis, causing it to bend or curve when erect. It affects somewhere between 1% and 9% of men, with the average guy being around 53 when it shows up.

What Causes It.

Probably a mix of genetic bad luck and penile injury. The injury can be as minor as a bent angle during sex. The body overreacts and lays down too much scar tissue trying to heal.

How to Spot It.

• A hard lump or band of tissue felt under the skin of the penis

• A new bend or curve during erection (can go in any direction)

• Pain during erections (common early, usually fades over 12 to 18 months)

• The penis getting shorter

• An hourglass or indented shape

• Trouble with intercourse because of the curve

Two Phases.

• Acute phase (first 12 to 18 months): Pain, the curve is still changing, the plaque is still forming. Surgery is not recommended yet.

• Stable phase (after 12 to 18 months): Pain is usually gone, the curve has settled. Surgery is on the table now.

Treatment.

Nonsurgical options:

• Collagenase (Xiaflex): The only FDA approved injection for Peyronie's. Used for men with a palpable plaque and a curve of at least 30 degrees. It can reduce the curve by about 16 to 17 degrees on average.

• Penile traction therapy: Wearing a stretching device several hours a day. Can modestly improve the curve and help with length.

• Verapamil or interferon injections: Variable evidence, but interferon has shown some benefit for curvature, plaque size, and pain.

• Shockwave therapy: Best for pain relief, not so much for the curve itself.

• Oral medications (vitamin E, colchicine, tamoxifen): None have strong evidence on their own.

Surgical options (for stable disease when intercourse is not possible):

• Penile plication: Shortens the longer side to straighten things out. Simpler, but causes some shortening.

• Plaque incision and grafting: Cuts or removes the scar and patches the area. Better for severe curves but riskier.

• Penile prosthesis: For men who have both Peyronie's and severe ED. Fixes both problems and has high satisfaction.

The Emotional Side.

Almost half of men with Peyronie's experience depression, and 81% report emotional distress. This is not "just cosmetic." Partners are affected too. Counseling and honest conversation are part of real treatment.

Common Misdiagnosis.

A slight natural curve that has always been there is not Peyronie's. Many men have a mild curve since puberty. Peyronie's involves a new curve, often with pain and a palpable plaque.

Phimosis: When the Foreskin Will Not Cooperate

What It Is.

The inability to pull the foreskin back over the head of the penis. In kids, this is normal and usually fixes itself by puberty. In adults, it usually means scarring or a skin condition.

What Causes It in Adults.

• Lichen sclerosus, a chronic inflammatory skin condition (the most common cause)

• Repeated infections (balanitis)

• Scarring from yanking the foreskin too hard

• Diabetes (raises the risk of infections and scarring)

How to Spot It.

Trouble or inability to pull the foreskin back. The foreskin balloons out during urination. Pain during erections or sex. A tight, whitish ring of scar tissue at the tip.

Treatment.

• Topical steroid cream (betamethasone 0.05% twice daily for 4 to 8 weeks): The recommended first treatment. Success rates run from 65% to 95%.

• Gentle stretching combined with the cream

• Preputioplasty: A minor surgery that widens the opening without removing the foreskin.

• Circumcision: The definitive fix when other things fail, or when lichen sclerosus is involved.

Paraphimosis: The Foreskin Emergency

What It Is.

The foreskin gets stuck behind the head of the penis and cannot be pulled forward again. A tight band traps blood, the head swells, and the swelling makes the trap worse. It is a literal vicious cycle.

Why It Is Urgent.

🚨 Paraphimosis is an emergency. If you can't reduce it quickly, go to the ER.

The trapped blood supply can cause tissue death within hours. The longer you wait, the harder it is to reduce manually, and the more likely you'll need surgical intervention.

Common Causes.

Forgetting to pull the foreskin forward after cleaning, after a catheter, or after a medical exam. This is exactly why nurses and doctors are trained to always return the foreskin to its normal position.

Treatment.

Manual reduction (steady pressure to push the swollen head back through the tight ring). Ice and sugar can help reduce swelling first (sugar works through osmosis, drawing fluid out). If manual reduction fails, a small cut in the tight band fixes it, usually followed by circumcision later.

Balanitis: Inflammation of the Tip

What It Is.

Redness, swelling, and soreness of the head of the penis, sometimes including the foreskin (then called balanoposthitis). It affects 4 to 11% of uncircumcised males.

What Causes It.

• Poor hygiene (the most common trigger by far)

• Yeast infection (the most commonly found organism)

• Bacterial infection

• Skin conditions (psoriasis, lichen planus, lichen sclerosus)

• Allergic reactions to condoms, lubricants, soaps, or spermicides

• Diabetes (high sugar in urine feeds yeast and bacteria)

How to Spot It.

Red, shiny, sore glans. Discharge under the foreskin. Itching or burning. Trouble pulling the foreskin back. An unpleasant smell.

Treatment.

• Better hygiene: gentle daily washing with warm water, cleaning under the foreskin, drying thoroughly

• Antifungal cream (clotrimazole or miconazole) if yeast is the culprit

• Antibiotic cream or pills if bacterial

• Topical steroid for skin conditions

• Treating the underlying diabetes if relevant

• Circumcision for repeated cases

Common Misdiagnosis.

Balanitis can look like many things, and many things look like balanitis. Penile cancer can imitate a stubborn balanitis. Any sore or lesion that does not get better in two to four weeks of treatment needs a biopsy.

Priapism: The Erection That Will Not Quit

What It Is.

An erection that lasts more than four hours and is not related to sexual activity. Despite what comedies suggest, this is a painful medical emergency.

Two Types.

• Ischemic (low flow): The common and dangerous type. Blood is stuck in the penis. Painful and rigid. Emergency.

• Nonischemic (high flow): Usually from trauma. Less painful, less urgent.

What Causes It.

• Sickle cell disease (the most common cause in children, and major in adults)

• Medications: ED injections, trazodone, certain antipsychotics, blood thinners

• Recreational drugs: cocaine, ecstasy, heavy alcohol use

• Rarely: leukemia, spinal cord injury

Why It Is an Emergency.

After four to six hours of the dangerous type, permanent damage to the erectile tissue starts. After 24 to 48 hours, the damage is usually permanent, leading to lifelong ED.

Treatment.

Draining blood from the penis with a needle and injecting a medication (phenylephrine) to constrict blood vessels. If that fails, surgical shunting may be needed.

The takeaway: If an erection lasts more than four hours, do not wait it out. Do not text your buddies a joke about it. Go to the emergency room.

🚨 Priapism is a medical emergency. ER now.

• Any erection lasting more than four hours that isn't related to sexual activity counts.

• Permanent erectile damage begins around 4 to 6 hours in the dangerous (ischemic) type.

• By 24 to 48 hours, the damage is usually permanent — meaning lifelong ED.

No, it won't sort itself out. No, ice and walking it off don't fix it. The treatment is fast and effective if you get there in time.

Penile Skin Conditions: A Quick Tour

The skin on your penis can develop the same conditions as skin elsewhere, but the warm, moist environment makes things look different than expected.

• Psoriasis: Red or salmon colored patches, often without the silvery scales seen elsewhere because of moisture. Usually shows up on other body parts too.

• Lichen sclerosus: White, thin, crinkly patches on the glans or foreskin. Can cause tightening (phimosis). If untreated, it slightly raises the risk of penile cancer. Treated with strong topical steroids.

• Lichen planus: Itchy, purple, flat topped bumps. Often involves the mouth too.

• Genital warts (condyloma): Caused by HPV types 6 and 11. Flesh colored, cauliflower like growths. Treated with topical creams, freezing, or removal.

• Genital herpes: From herpes simplex virus. Clusters of painful blisters that turn into shallow sores. Recurrent. Controlled but not cured with antivirals like acyclovir or valacyclovir.

• Contact dermatitis: Reaction to latex condoms, lubricants, soaps, or detergents. Red, itchy, sometimes blistered skin. Treated by figuring out the trigger and avoiding it.

When to Worry About Penile Cancer.

Penile cancer is rare but serious. Warning signs include a painless lump, a sore that will not heal, a velvety red patch, or a mushroom like growth on the glans or foreskin. Risk factors include HPV infection, smoking, phimosis, lichen sclerosus, and lack of circumcision. Any suspicious lesion needs a biopsy. Benign conditions can mimic cancer and vice versa, so do not let anyone wave it off without a closer look if something just is not right.

Part Three: Hormones

Testosterone is the headline act, and it runs more of you than most guys realize: mood, energy, muscle, bone, libido, sleep, the lot. When it drops, you feel it everywhere.

Low Testosterone (Hypogonadism)

What It Is.

The testicles do not produce enough testosterone. This can be primary (the testicles themselves are the problem) or secondary (the brain is not telling the testicles what to do).

Symptoms.

• Low sex drive (the most telling symptom)

• Erectile dysfunction

• Tiredness and low energy

• Loss of muscle mass and strength

• More body fat

• Mood changes (irritability, depression)

• Trouble concentrating

• Less body and facial hair

• Hot flashes (in severe cases)

• Weaker bones

Common Causes.

• Primary: Klinefelter syndrome, undescended testicles, mumps damage to the testicles, testicular trauma, chemotherapy or radiation, aging

• Secondary: Obesity (a major and fixable cause), opioid use, steroid medications, pituitary tumors, sleep apnea, heavy alcohol use, anabolic steroid use (which ironically shuts down your own production)

Diagnosis.

The Endocrine Society and the American Urological Association recommend:

• You must have symptoms (do not chase a number without symptoms)

• Two morning fasting total testosterone results below 300 ng/dL

• LH and FSH levels to figure out primary versus secondary

• Prolactin if secondary is suspected

• Baseline hematocrit and PSA before starting treatment

Treatment.

Fix what you can first. Weight loss, getting off opioids if possible, treating sleep apnea, and cutting back on alcohol can all raise testosterone naturally.

Testosterone replacement therapy (TRT) options:

• Injections: Every one to two weeks. Cheap. Can cause peaks and valleys in levels.

• Topical gels (AndroGel, Testim): Daily. Steady levels. Risk of transferring to partners or kids through skin contact.

• Patches: Daily. Can irritate the skin.

• Nasal gel (Natesto): Three times a day.

• Pellets (Testopel): Implanted under the skin every three to six months.

Benefits of TRT.

Improved sex drive, better erections, more energy, better mood, more muscle, stronger bones.

Risks and Monitoring.

• Too many red blood cells (erythrocytosis): A hematocrit above 54% means stopping treatment. This is the most common side effect.

• Fertility: TRT suppresses sperm production. Do not use it if you might want kids soon. Alternatives like clomiphene citrate or hCG can raise testosterone while keeping fertility.

• Prostate: TRT does not cause prostate cancer, but a baseline PSA is recommended.

• Sleep apnea: Can get worse in some men.

• Heart: The TRAVERSE trial in 2023 showed that TRT in men with heart disease risk factors did not increase serious heart events compared to placebo.

Reasons Not to Use TRT.

• You want to have kids in the near future

• Hematocrit above 48% at the start

• Untreated severe sleep apnea

• Uncontrolled heart failure

• Active or suspected prostate or breast cancer

Foods and Lifestyle for Healthy Testosterone.

• Keep a healthy weight (obesity is the biggest fixable risk factor)

• Exercise regularly, especially resistance training

• Get 7 to 9 hours of sleep (testosterone is made during sleep)

• Eat a balanced diet with zinc (oysters, beef, pumpkin seeds), vitamin D (fatty fish, sunlight), and healthy fats

• Limit alcohol

• Manage stress (cortisol from stress lowers testosterone)

Supplements With Some Evidence.

• Zinc: Helpful if you are deficient. Too much causes copper deficiency.

• Vitamin D: Helpful if low (below 30 ng/mL). Does not boost levels if you are already normal.

• Ashwagandha: Some studies show modest increases in testosterone in men with low levels.

• Fenugreek: Some evidence for modest support.

• D aspartic acid, tribulus, maca: Weak or no real evidence despite heavy marketing.

Part Four: STIs and the Penis

STIs deserve their own book, but here is the essential information:

• Chlamydia and gonorrhea: The most common bacterial STIs. Cause burning urination and discharge, but often no symptoms at all. Diagnosed with urine tests or swabs. Treated with antibiotics. Untreated, they cause infertility.

• Syphilis: Starts as a painless ulcer (chancre) on the penis. The textbook description (painless, firm, clean based) is only 31% accurate, meaning most sores do not look classic. Blood tests confirm it. Treated with penicillin.

• Genital herpes: Painful blisters and sores. The classic look is only 35% accurate. Many infections have no symptoms. Managed with antivirals.

• HPV: The most common STI overall. Most infections clear on their own. High risk types can cause penile cancer. The HPV vaccine, ideally given at age 11 to 12 but approved up to 45, prevents both warts and most HPV related cancers.

The Big Lesson.

You cannot tell what an STI is just by looking. Lab tests are essential. If something looks weird, get tested. It is faster than worrying about it.

Part Five: Male Infertility

About 15% of couples cannot conceive after a year of trying, and male factors are involved in roughly 40 to 50% of these cases. Both partners should be evaluated at the same time, not one and then maybe the other.

How Fertility Actually Works.

Testicles make sperm. Sperm move through the epididymis to mature, then up the vas deferens, then mix with fluid from the seminal vesicles and prostate before exiting through the urethra. A problem at any point in this chain can cause infertility.

The Workup.

It starts with three things: a careful history, a physical exam, and a semen analysis. The semen analysis measures sperm count, motility (how well they swim), morphology (shape), and volume. The sample is collected after two to five days of not ejaculating and needs to reach the lab within an hour.

Key points:

• One abnormal result does not mean infertility. Repeat it.

• No single sperm number is highly predictive on its own.

• A perfectly normal semen analysis does not guarantee fertility either.

If something is off, the next steps usually include hormone tests (FSH and testosterone), a more careful physical exam, and sometimes genetic testing (karyotype and Y chromosome analysis) when sperm counts are very low or absent.

Azoospermia: When There Are No Sperm.

Zero sperm in the ejaculate. Affects about 1% of all men and 10 to 15% of infertile men.

• Obstructive: Testicles make sperm but something is blocking the path. Often fixable surgically or by retrieving sperm directly from the testicle for IVF.

• Nonobstructive: Testicles are not making enough sperm. Even here, tiny pockets of production may exist. A specialized procedure called microdissection testicular sperm extraction (micro TESE) can find sperm in 50 to 60% of men with Klinefelter syndrome and about half of men with certain Y chromosome deletions.

Common Treatable Causes.

• Varicocele: The most common surgically fixable cause. Microsurgical repair can improve sperm quality and pregnancy rates, though evidence on live birth rates is still mixed.

• Hormone problems: Low testosterone with low FSH/LH can be treated with clomiphene, hCG, or FSH injections. Do not use testosterone replacement, since it shuts down sperm production.

• Infections: Treated with antibiotics.

• Ejaculatory duct obstruction: Treated with a transurethral procedure.

Lifestyle Factors That Hurt Sperm.

• Heat (hot tubs, saunas, laptops on the lap, long sitting)

• Smoking

• Cannabis

• Heavy alcohol use

• Obesity

• Anabolic steroids and testosterone use (a common, preventable cause of infertility)

• Some medications (sulfasalazine, certain chemo agents, alpha blockers, finasteride)

Supplements and Antioxidants.

Things like CoQ10, L carnitine, vitamins C and E, zinc, selenium, and folic acid have shown some benefit in small studies for sperm parameters. None have been proven in large trials to improve live birth rates, but they may help as an add on, especially after varicocele repair.

Assisted Reproduction.

• Intrauterine insemination (IUI): Good for mild male factor issues.

• In vitro fertilization with intracytoplasmic sperm injection (IVF ICSI): A single sperm is injected directly into an egg. The most effective option for severe male factor infertility, and works even with very low sperm counts or surgically retrieved sperm.

The Emotional Side.

Infertility is stressful. Men dealing with it have higher rates of anxiety, depression, and relationship strain. Counseling is an underused but valuable resource.

Part Six: Ejaculation Disorders

Three things can go sideways with ejaculation: too fast, too slow, or in the wrong direction. All three are common, all three are treatable, and almost nobody talks about them.

Premature Ejaculation

What It Is.

Ejaculation that consistently happens before or within about one minute of penetration, with no ability to delay it, causing distress or avoidance of intimacy. It can be lifelong (always there since the first time) or acquired (developed later after normal function).

How Common.

Estimates run from 4% to 39% depending on definition. By any measure, it is the most common male sexual dysfunction. You are far from alone.

What Causes It.

• Lifelong PE: Likely differences in serotonin signaling in the brain.

• Acquired PE: Performance anxiety, coexisting ED (the guy rushes before losing the erection), relationship issues, hyperthyroidism, prostatitis, medications, depression and anxiety.

Common Misdiagnoses.

• Normal variation: Occasional quick finishes during high excitement, long abstinence, or with a new partner are normal.

• ED disguised as PE: Treat the ED and the apparent PE often resolves.

• Mismatched expectations: If your latency is within the normal 5 to 7 minute range but the couple is unhappy, it may be a communication issue rather than a medical one.

Treatment.

Behavioral techniques (the foundation):

• Stop start technique: Stop all stimulation when close to climax. Wait about 30 seconds. Resume. Repeat. Over weeks, you learn to recognize and control the point of no return.

• Squeeze technique: When close, the partner firmly squeezes the head of the penis until the urge passes.

• Pelvic floor exercises: Strengthening the muscles you use to stop urination can improve control.

• Sensate focus: Structured touching exercises that reduce performance pressure.

These are effective, free, and have no side effects. The catch is they require practice and a willing partner.

Topical anesthetics:

• Lidocaine prilocaine cream (EMLA) or lidocaine spray applied to the head 10 to 20 minutes before sex.

• A condom afterward to prevent numbing your partner.

• Side effects include reduced sensation and possible transfer to the partner.

• Moderate to high quality evidence shows they increase latency.

Oral medications:

• Daily SSRIs: First line pharmacotherapy. Paroxetine is the most effective, with average latency increases of about 5 to 6 minutes (some studies show up to an 8 fold increase). Other choices include sertraline, citalopram, and fluoxetine.

• On demand dapoxetine: A short acting SSRI taken 1 to 3 hours before sex. Not available in the U.S.

• On demand clomipramine: A tricyclic antidepressant taken 3 to 6 hours before sex. Effective but has more side effects.

• PDE5 inhibitors: Help when PE coexists with ED. Better erection confidence reduces the urge to rush.

• Tramadol: Some efficacy but carries dependence risk and danger when combined with SSRIs. Not first line.

Critical safety notes:

• SSRIs can cause nausea, drowsiness, decreased libido, and (ironically) ED.

• Serotonin syndrome is a rare but serious risk if you combine multiple serotonin drugs.

• SSRIs should not be used in men with bipolar disorder.

• PE typically returns when medication stops. This is management, not cure.

• A Cochrane review found men on SSRIs were twice as likely to improve as those on placebo.

Psychological therapy:

The AUA/SMSNA guideline recommends seeing a mental health professional with sexual health expertise. Combination treatment (behavioral plus medication) tends to work better and last longer than either approach alone.

How to Bring It Up.

• With a doctor: "I finish too quickly during sex and it is causing problems. What can we do?"

• With a partner: "I want our intimate life to be better for both of us. I have been reading about some techniques and would like to try them together."

Making it a team effort lowers the shame and raises the success rate.

Retrograde Ejaculation

What It Is.

Semen goes backward into the bladder instead of forward out of the penis during orgasm. You feel the orgasm but produce little or no fluid. The semen is later passed harmlessly in the urine.

What Causes It.

The bladder neck normally closes during ejaculation. When that closure fails, things go the wrong way.

• Medications: Alpha blockers (tamsulosin, alfuzosin) for enlarged prostate are the most common cause.

• Surgery: Prostate surgery, bladder neck surgery, or lymph node dissection for testicular cancer.

• Nerve damage: Diabetes is a major cause. Also spinal cord injury, multiple sclerosis, Parkinson's disease.

• Anatomy: Some men just have a naturally weak bladder neck.

How to Spot It.

• Orgasm with little or no ejaculate (dry orgasm)

• Cloudy urine after orgasm (the semen ended up in the bladder)

• Infertility (often how it gets discovered)

Diagnosis.

A urine sample after orgasm is checked under the microscope. Sperm in the urine confirms it.

Treatment.

• Stop the medication if possible. Often this fixes it.

• Sympathomimetic medications: Pseudoephedrine, ephedrine, or imipramine can help tighten the bladder neck. Success rates of 12 to 43% depending on the cause.

• Sperm retrieval from urine: When fertility is the goal and medications fail, sperm can be collected from urine after orgasm. The urine is made less acidic with sodium bicarbonate first to protect the sperm. Those sperm can be used for IUI or IVF.

• Penile vibratory stimulation: Helpful for men with spinal cord injuries.

It is not harmful to your health, but the loss of visible ejaculation can be distressing. Talking about it with your partner helps a lot.

Delayed Ejaculation

What It Is.

Persistent trouble reaching orgasm and ejaculating despite plenty of arousal and stimulation. Some men take 25 to 30 minutes or more. Some cannot ejaculate during partnered sex at all.

How Common.

The least common major male sexual dysfunction, with prevalence around 1 to 4%. Probably underreported because many men do not know it is a treatable condition.

What Causes It.

Psychological: Depression, performance anxiety, relationship trouble, past sexual trauma, idiosyncratic masturbation patterns (using techniques, pressure, or speed that cannot be replicated during sex).

Medical: Aging (the most significant physiologic factor), diabetes and diabetic neuropathy, multiple sclerosis, spinal cord injury, prostate or pelvic surgery, low testosterone, high prolactin, thyroid problems.

Medications (very common cause): SSRIs and SNRIs, antipsychotics, alpha blockers (tamsulosin), opioids, heavy chronic alcohol use.

Common Misdiagnoses.

• Retrograde ejaculation: You may be ejaculating, just backward. A post orgasm urine test tells the difference.

• ED: Some men lose the erection before climax and think it is ED rather than DE.

• Normal variation: Occasional difficulty due to fatigue, alcohol, or distraction is not the same as a disorder.

Treatment.

No FDA approved medication for DE exists, but several things can help:

Fix what you can:

• If a medication is responsible, especially an SSRI, talk about switching to bupropion (the antidepressant with the lowest rate of sexual side effects) or adjusting the dose.

• Treat underlying conditions: control diabetes, check hormones, treat depression.

• Cut back on alcohol or other substances.

Behavioral strategies:

• Adjust masturbation habits if they involve high pressure, high speed, or unusual techniques.

• Use different positions, sexual aids, or fantasy to increase arousal during sex.

• Remove the goal of ejaculation. Paradoxically, trying harder makes it harder.

Medications (limited evidence):

• Bupropion: Most commonly used, with modest benefits.

• Buspirone: An anti anxiety medication with variable results.

• Testosterone: If levels are low, restoring them may help.

• Cabergoline: If prolactin is high, lowering it can restore ejaculation.

Therapy: Cognitive behavioral therapy and sex therapy address the psychological side and the relationship dynamics. Couples therapy is particularly useful since DE affects both partners.

A Note for Partners.

Partners often blame themselves, wondering if they are not attractive enough or not doing something right. DE is medical or psychological, not a reflection of attraction. That message is essential for both partners.

Part Seven: Penile Fracture

What It Is.

Despite the name, there is no bone in the human penis. A penile fracture is actually a tear in the tunica albuginea, the tough covering of the erectile chambers. It happens when the erect penis is suddenly bent or struck hard.

How It Happens.

Most often during vigorous sex, especially when the penis slips out and slams into the partner's perineum or pubic bone. Aggressive masturbation can also do it.

How to Spot It.

The presentation is unforgettable:

• A sudden cracking or popping sound during sex

• Immediate loss of the erection

• Severe pain

• Rapid swelling and bruising, creating what doctors call the eggplant deformity because the penis swells and turns deep purple

• The penis may bend toward the unbroken side

• Blood at the tip of the urethra suggests a urethral injury too (happens in 10 to 20% of cases)

Why It Is an Emergency.

🚨 Penile fracture is a surgical emergency. ER tonight, not tomorrow.

The signs are unforgettable: a sudden popping or cracking sound during sex, immediate loss of erection, severe pain, and rapid swelling that turns the penis purple — the so-called "eggplant deformity." If there's also blood at the tip of the urethra, the urethra is likely torn too.

Without surgical repair, penile fracture often leads to permanent ED, curvature, and painful erections. With immediate repair, about 90% of men have excellent outcomes.

Treatment.

Surgical exploration and repair, ideally within a few days. The surgeon exposes the tear, removes the blood clot, and stitches the tear closed. If the urethra is also injured, it is fixed at the same time. Conservative management (ice, splinting) was tried in the past but has way worse outcomes and is no longer recommended.

Recovery.

Most men can return to sexual activity in about six weeks. Over 90% of men recover normal erections.

Common Misdiagnosis.

A penile fracture can be confused with a ruptured dorsal vein of the penis, which causes similar bruising but does not need urgent surgery.

Part Eight: Chronic Pelvic Pain Syndrome

What It Is.

Also called chronic prostatitis (Category III). Pain in the pelvis, perineum (the area between the scrotum and the anus), lower belly, or genitals for at least three of the past six months. Despite the name prostatitis, most cases have no bacterial infection.

How Common.

Affects 2 to 10% of men, and is one of the most common urology diagnoses in men under 50.

What Causes It.

Honestly, nobody knows for sure. Leading theories include pelvic floor muscle tension, oversensitive nerves, a prior infection that triggered ongoing inflammation, stress, and possibly autoimmune factors.

How to Spot It.

• Aching or burning pain in the perineum, penis, testicles, lower back, or lower belly

• Pain during urination or ejaculation

• Urinary frequency or urgency

• Sometimes coexisting ED or premature ejaculation

• Symptoms that come and go over months or years

Treatment.

No single cure, but a layered approach works:

• Pelvic floor physical therapy: Often the most effective single thing. A specialized PT works on releasing tight pelvic floor muscles.

• Alpha blockers (tamsulosin): Help with urinary symptoms.

• Anti inflammatory medications: NSAIDs for pain.

• Stress management and CBT: Chronic pain and anxiety feed each other.

• Trigger avoidance: Prolonged sitting, cycling, caffeine, alcohol, and spicy foods may worsen things.

• Antibiotics: Only if a bacterial infection is actually documented.

Common Misdiagnoses.

CPPS can mimic UTIs, epididymitis, interstitial cystitis, irritable bowel syndrome, and even testicular cancer. A thorough evaluation is important.

Part Nine: How to Talk About This Stuff

Talking to a Doctor

• Be direct. "I have a lump on my testicle" or "I am having trouble with erections" gives the doctor exactly what they need.

• Write it down beforehand if saying it out loud feels too hard.

• Doctors are trained for this. Genital complaints are among the most common reasons men see a doctor.

• If your doctor dismisses your concern, get a second opinion.

Talking to a Partner

• Pick a calm, private moment, not during or right after intimacy.

• Use "I" statements: "I have noticed something that concerns me."

• Frame it as a health issue, because that is what it is.

• For ED: "This is not about attraction. It is a medical condition and I am working on it." Most partners are far more understanding than men expect. Studies show that secrecy upsets partners more than the condition itself.

• For an STI diagnosis: "I found out I have something. I want to be honest with you so we can both get tested and treated." Hard, but the right thing to do.

• For a testicular lump: "I found something during a self exam and I have a doctor's appointment. I wanted you to know."

Talking to Yourself

This might be the hardest conversation. Some honest questions:

• Have I noticed a change in my body that I have been ignoring?

• Am I avoiding the doctor because I am afraid of what they might find?

• Am I blaming stress or aging for something that might have a medical explanation?

• Would I tell my best friend or brother to get this checked out?

If you would tell your friend, the advice applies to you too. Ignoring a problem has never once made it go away.

Part Ten: Prevention and Daily Maintenance

Daily Habits

• Hygiene: Wash the genital area daily with warm water. If uncircumcised, gently retract the foreskin and clean underneath. Avoid harsh soaps. Pat dry. Moisture is the enemy.

• Underwear: Breathable, supportive cotton is best for everyday wear. Excessively tight clothing raises scrotal temperature, which can affect sperm.

• Self awareness: Know what your testicles normally feel like. The monthly self exam is the single most important habit in this guide.

Lifestyle That Protects Everything

• Exercise: 150 minutes a week of moderate activity. Resistance training is especially good for testosterone.

• Diet: A Mediterranean style pattern is associated with better erections, healthier sperm, and lower heart disease risk. Processed foods, excess sugar, and trans fats work against you.

• Weight management: Obesity hurts testosterone, sperm quality, erections, and cancer risk. Even a 5 to 10% weight loss matters.

• Sleep: 7 to 9 hours. Testosterone is made during sleep. Treating sleep apnea can dramatically raise testosterone.

• Stress management: Cortisol from chronic stress suppresses testosterone and worsens ED.

• Quit smoking: Smoking damages the small blood vessels in the penis. Quitting improves erections, sometimes in weeks.

• Moderate alcohol: Heavy drinking suppresses testosterone, impairs erections, damages the liver, and increases risky behavior.

• No anabolic steroids: They shut down your own testosterone production, shrink testicles, and can cause infertility that takes a long time to reverse, if it reverses at all.

Vaccinations

The HPV vaccine is recommended for all boys and girls at ages 11 to 12, with catch up through age 26 and shared decision making through 45. It prevents genital warts and most HPV related cancers, including penile cancer.

Screening

• Testicular self exam: Monthly, starting in the teens.

• STI screening: Sexually active men should discuss screening based on risk factors. Men who have sex with men should be screened at least yearly for HIV, syphilis, gonorrhea, and chlamydia.

• Testosterone testing: Only if symptoms are present.

• Prostate screening: Discuss with your doctor starting at age 50, or 40 to 45 if higher risk.

Part Eleven: Myths That Need to Retire

Myth: Tight underwear causes infertility. Reality: Tight underwear slightly raises scrotal temperature, which may modestly affect sperm counts. It is not birth control, and switching to boxers will not by itself cure infertility.

Myth: Masturbation causes blindness, hair loss, or low testosterone. Reality: None of this is true. Masturbation is a normal part of human sexuality and does not lower testosterone in any meaningful way.

Myth: If I can get an erection sometimes, I do not have ED. Reality: ED is not all or nothing. Many men get morning erections or erections with self stimulation but struggle with partners. Inconsistent erections still count and deserve evaluation.

Myth: Testosterone therapy is just for bodybuilders. Reality: TRT is a real medical treatment for men with diagnosed low testosterone and symptoms. It is not the same as recreational steroid abuse.

Myth: A curved penis means something is wrong. Reality: A slight curve that has always been there is normal anatomy. Peyronie's involves a new curve, usually with a plaque and pain. If the curve is new, get it checked.

Myth: Real men do not go to the doctor. Reality: Men live about five years less than women, and much of that gap comes from delayed medical care. Going to the doctor is not weakness. It is the smartest thing you can do for yourself and the people who count on you.

Myth: Testicular cancer means losing your manhood. Reality: Losing one testicle almost never affects testosterone, sex, or fertility. The remaining testicle picks up the slack. Many men have fathered children and lived completely normal lives after treatment.

The Bottom Line

Your body talks to you. A lump, an ache, a change in function: these are not inconveniences to ignore. They are messages worth hearing.

The conditions in this guide range from minor nuisances to life threatening emergencies, but they all share one trait: they do better with early attention. The man who checks his testicles monthly, sees a doctor when something changes, and takes care of his cardiovascular health is not being paranoid. He is being smart.

You would not drive your car for 100,000 miles without ever looking under the hood. Your body deserves at least that much. And unlike a car, you cannot trade it in.

Take care of what you have got. It is the only equipment you will ever own.

This article is for general education and isn't medical advice. Penile, testicular, and hormonal conditions vary enormously between individuals, and the only way to know what's actually going on with your body is to be examined by a qualified clinician. If something has changed — a lump, a function shift, persistent pain, a new curve, a missed milestone — see a doctor.