Testicular cancer is uncommon overall but the most common solid cancer in men aged 15 to 35. It's also one of the most curable when caught early — five-year survival exceeds 95 percent for localized disease. The catch is that it usually presents as a painless lump, which is easy to ignore or explain away.
Self-awareness — knowing what your testicles normally feel like — is more useful than any rigid monthly ritual. The American Urological Association and major cancer organizations differ on whether to formally recommend routine self-exams, largely because of concerns about false positives. But knowing your baseline, and acting on real changes, is uncontroversial.
How to do a self-check
The exam takes about a minute and is easiest after a warm shower, when the scrotal skin is relaxed.
- Roll each testicle gently between thumb and fingers of both hands
- Feel for shape, size, and consistency — normal is smooth, firm, and oval
- Locate the epididymis, the soft tube along the back of each testicle; this is normal and not a lump
- Compare left to right; one hanging lower or being slightly larger is normal
- Note any hard nodule, painless swelling, or change in weight or firmness
Do this every month or two if you're between 15 and 45. The goal isn't to become an amateur oncologist. It's to have a mental map so a change registers.
Warning signs worth a same-week appointment
A painless lump on or in a testicle is the classic sign, but it's not the only one. Take these to a primary care doctor or urologist promptly:
- Any new firm lump, however small
- A feeling of heaviness or dragging in the scrotum
- Dull ache in the lower abdomen, groin, or scrotum that persists
- Sudden swelling of a testicle
- Breast tenderness or enlargement (some testicular tumors produce hormones)
- A testicle that feels noticeably harder or larger than before
Sharp, severe pain — especially with sudden onset — is a different problem. Testicular torsion is a surgical emergency; the window to save the testicle is roughly six hours. Any severe scrotal pain warrants an ER visit, not a wait-and-see approach.
What actually gets evaluated
A clinician will palpate, then almost always order a scrotal ultrasound. It's painless, quick, and highly accurate at distinguishing solid masses from benign fluid collections (hydroceles), varicoceles, or cysts. Blood tests for tumor markers (AFP, beta-hCG, LDH) may follow if imaging is concerning.
Most lumps turn out to be benign. Epididymal cysts, varicoceles (dilated veins that feel like a bag of worms), and hydroceles are all common. But the calculation cuts strongly toward early evaluation: benign findings cost you one visit; a missed tumor costs treatment intensity and sometimes fertility.
If you find something and it turns out to be nothing, you have not wasted anyone's time. That is exactly what the visit is for.
Risk factors and prevention
Risk factors are mostly non-modifiable:
- Cryptorchidism (undescended testicle at birth) — the strongest known risk, even after surgical correction
- Family history, particularly brother or father
- Personal history of testicular cancer in the other testicle
- Age 15 to 45 for the most common subtypes
Race matters — incidence is highest in white men — though this doesn't change screening advice. There's no dietary or lifestyle change with strong evidence for prevention. This is a cancer where early detection, not primary prevention, drives outcomes.
Fertility and follow-up
Men diagnosed with testicular cancer are usually offered sperm banking before treatment, since chemotherapy and radiation can impair fertility. Even orchiectomy — removal of one testicle — typically leaves testosterone and fertility intact when the other is healthy. Long-term survivors need ongoing monitoring for recurrence and for late effects of treatment, including cardiovascular risk from certain chemotherapy regimens.
The bottom line
You don't need a rigid schedule. You need to know what your testicles feel like well enough to notice a change, and you need to take that change to a doctor within a week. The math on this cancer is unusually favorable — but only for men who show up early.