The most common early warning sign is a lump or swelling in one testicle
Most men with testicular cancer notice a lump or hard mass in one testicle first. The lump is usually painless, which is why many men don't realize anything is wrong until they feel it during a shower or self-exam. The lump may be the size of a pea or larger, and it feels different from the normal tissue around it—firmer and sometimes slightly irregular.
Not every lump in the testicle is cancer. Benign cysts and other non-cancerous growths are common. But any new lump or change in how a testicle feels should be checked by a doctor. The key is that it's new and different from what you felt before, or different from the other testicle.
Some men also notice that one testicle becomes noticeably larger or heavier than the other, even without feeling a distinct lump. This swelling can develop over weeks or months.
Key Takeaways
- A painless lump or hard mass in one testicle is the most common sign and should be examined by a doctor.
- Testicular pain, heaviness, or a dull ache in the lower abdomen or groin can occur, though some men have no pain at all.
- Fluid buildup around the testicle, breast tenderness, or fatigue may accompany the lump depending on the cancer type.
- Symptoms can develop over weeks or months, and seeing a doctor early gives the best chance for treatment to work well.
- A physical exam and ultrasound are the standard way doctors check for testicular cancer.
Pain or discomfort in the testicle or groin area
Some men experience pain, aching, or a feeling of heaviness in the affected testicle. The pain may be mild and constant, or it may come and go. A few men report a dull ache in the lower abdomen or groin area rather than in the testicle itself.
It's important to know that not all testicular cancers cause pain. Many men have no pain at all and discover the cancer only because they felt a lump or noticed swelling. Pain alone—without a lump—is less likely to be cancer, but it still warrants a doctor's visit to rule out other conditions.
Swelling or fluid buildup around the testicle
A buildup of fluid around the testicle, called a hydrocele, can occur with testicular cancer. This causes the scrotum to feel swollen or enlarged, and the testicle may feel like it's sitting in fluid. The swelling is usually painless but noticeable to the touch.
Hydroceles are common and often benign, but when they appear suddenly in a young man or alongside other symptoms, they warrant investigation. A doctor can use ultrasound to see whether fluid alone is present or whether there's also a mass.
Breast tenderness or enlargement
Some testicular cancers produce hormones that cause breast tissue to swell or become tender. This symptom, called gynecomastia, may appear before other signs. A man might notice his nipples are sore or his chest feels fuller than usual.
Breast changes can have many causes unrelated to cancer, but when they occur alongside testicular symptoms, they should be mentioned to a doctor. Hormone-producing cancers tend to be caught earlier because this visible change prompts men to seek care.
Fatigue, weight loss, or feeling generally unwell
In later stages, testicular cancer can cause fatigue that doesn't improve with rest, unexplained weight loss, or a general sense of not feeling well. A man might notice he has less energy than usual or that his appetite has changed.
These symptoms are less specific to testicular cancer and can signal many conditions. They're more likely to appear if the cancer has spread beyond the testicle. This is why catching the disease early—when symptoms are localized to the testicle itself—makes a real difference in treatment outcomes.
When to see a doctor about testicular symptoms
Any new lump, swelling, or change in how a testicle feels should be evaluated by a doctor. You don't need to wait to see if it goes away on its own. A primary care doctor can do an initial exam, or you can see a urologist, who specializes in the urinary and reproductive systems.
The doctor will feel both testicles to compare them and ask about when you first noticed the change. If there's any concern, an ultrasound is ordered—a quick, painless imaging test that shows whether a mass is present and what it looks like. Most lumps turn out to be benign, but the only way to know is to have it checked.
Men between ages 15 and 40 are at highest risk for testicular cancer, though it can occur at any age. Doing a self-exam once a month—feeling both testicles in the shower when the scrotum is warm and relaxed—helps you notice changes early.
Symptoms that may indicate the cancer has spread
If testicular cancer spreads beyond the testicle, additional symptoms may develop. These include lower back pain (from enlarged lymph nodes), shortness of breath or chest pain (if cancer reaches the lungs), or abdominal swelling.
Catching cancer before it spreads is why early detection matters. A man who notices a lump and sees a doctor within weeks has a much better outlook than one who waits months. The cancer type and stage at diagnosis are the strongest predictors of how well treatment will work.
Frequently Asked Questions
Can testicular cancer be painless?
Yes. Many men with testicular cancer feel no pain at all. They discover it only by noticing a lump, swelling, or heaviness. Pain is not required for cancer to be present, which is why any new lump should be checked even if it doesn't hurt.
Is a lump in the testicle always cancer?
No. Most lumps in the testicle are benign cysts, scar tissue, or other non-cancerous growths. But a doctor must examine it to tell the difference. An ultrasound can usually determine whether a lump is concerning within a single visit.
How fast does testicular cancer grow?
Growth varies by cancer type. Some testicular cancers grow slowly over months, while others grow faster. This is another reason to see a doctor promptly—the sooner a diagnosis is made, the sooner treatment can begin if needed.
What does a testicular cancer lump feel like?
The lump typically feels hard and firm, sometimes slightly irregular or bumpy. It's usually painless. It may feel different in texture from the normal tissue around it, and it doesn't move as freely as normal testicle tissue does.
Should I do monthly self-exams?
Yes. A monthly self-exam—done in the shower when the scrotum is warm and relaxed—helps you learn what's normal for you and notice changes early. Gently roll each testicle between your fingers and thumb to feel for lumps or changes in size or texture.