Testicular Cancer Symptoms: The Complete Guide to Early Warning Signs
Testicular cancer is the most common cancer in men aged 15 to 35, yet most guys have no idea what to look for. The good news: it's one of the most treatable cancers, with high survival rates when caught early. The challenge is that many of the earliest symptoms are easy to dismiss or mistake for something else.
This guide covers the most common and clinically relevant symptoms of testicular cancer, from the obvious to the easily overlooked. Whether you found something during a self-exam or you're just trying to educate yourself, you'll learn what to watch for and when to talk to a doctor.
For more than 20 years, TCF and the broader community around this disease have helped men and families navigate the uncertainty that comes with testicular cancer. We hear from guys every day who say the same thing: "I wish I'd known what to look for." This guide exists so you don't have to say that.
The Most Common Symptoms of Testicular Cancer
1. A Painless Lump or Swelling on the Testicle
This is the single most common sign of testicular cancer. Most men discover it themselves, either during a testicular self-exam or by accident.
What it feels like: A hard, pea-sized lump on the front or side of the testicle. It's usually painless and may feel like a small pebble embedded in the surface. The lump is typically fixed in place (it doesn't move freely when you press it) and feels distinctly harder than the surrounding tissue.
What it doesn't feel like: Soft, squishy lumps that move freely are more commonly benign cysts or spermatoceles, and lumps found on the epididymis (the coiled tube behind the testicle) are also less likely to be cancerous. But these are general patterns, not rules. Any new lump should be evaluated by a doctor, regardless of how it feels. An ultrasound is the best next step for figuring out what you're dealing with.
For a deeper dive, see our complete guide to testicular lumps.
2. A Change in Testicle Size or Shape
One testicle may become noticeably larger or more swollen than the other. While it's perfectly normal for one testicle to be slightly larger or hang lower, a sudden or significant change in size is worth investigating.
Some men describe their testicle as feeling "heavier" than usual, even before they notice visible swelling. This heaviness can sometimes be the first clue that something has changed.
3. A Feeling of Heaviness in the Scrotum
Even without visible swelling, many men with testicular cancer describe a dull sense of heaviness or fullness in the scrotum or lower abdomen. This is caused by the tumor adding weight to the testicle or by fluid accumulating around it (a condition called a hydrocele).
This symptom is easy to brush off as "just a weird feeling," which is exactly why it's important to pay attention to changes that persist for more than a week or two.
4. A Dull Ache in the Lower Abdomen or Groin
A persistent dull ache in the groin area or lower belly can be an early sign of testicular cancer. This pain may come and go, and it doesn't have to be severe to be significant.
The ache can be caused by the tumor itself or by the testicle pulling on surrounding structures. Some men feel this before they ever notice a lump. If you're experiencing unexplained left testicle pain or right testicle pain, don't ignore it.
5. Pain or Discomfort in the Testicle
While the classic testicular cancer lump is painless, that doesn't mean the cancer itself always is. Some men experience a sharp or dull pain directly in the testicle. Others describe intermittent discomfort that seems to come and go without an obvious cause.
Important: Testicular pain has many possible causes, including injury, infection (epididymitis), torsion, and hernias. Most testicular pain is not cancer. But pain that persists for more than two weeks, or pain accompanied by a lump, warrants a medical evaluation.
Less Common and Advanced Symptoms
The symptoms below tend to appear when testicular cancer has grown larger or has begun to spread to other parts of the body. Their presence doesn't automatically mean the cancer is advanced, but they should prompt an urgent medical visit.
6. Breast Tenderness or Swelling (Gynecomastia)
Certain types of testicular tumors, particularly those that produce the hormone hCG (human chorionic gonadotropin), can cause breast tissue to grow or become tender. This is called gynecomastia and it affects a small percentage of men with testicular cancer.
If you notice unexpected breast changes alongside any other symptoms on this list, mention both to your doctor. Hormone-producing tumors can also cause early puberty in boys.
7. Shortness of Breath, Chest Pain, or Coughing
If testicular cancer spreads to the lungs (which is one of the more common sites of metastasis), it can cause a persistent cough, shortness of breath, or chest tightness. Some men may even cough up blood.
These respiratory symptoms in a young man without a respiratory illness should raise a red flag, particularly when combined with any testicular changes.
8. Persistent Lower Back Pain
This is different from the mild abdominal or groin ache described in symptom #4. Persistent lower back pain that doesn't improve with rest or typical treatments can be a sign that testicular cancer has spread to the retroperitoneal lymph nodes. These nodes sit along the spine in the back of the abdomen, and when they enlarge, they can press against surrounding structures. If you're experiencing new, unexplained back pain along with any testicular changes, bring it up with your doctor.
9. Headaches or Confusion
In rare cases where testicular cancer has metastasized to the brain, symptoms can include persistent headaches, confusion, or changes in behavior. This is uncommon but represents a medical emergency that requires immediate attention.
10. Swelling in the Legs
If cancer spreads to lymph nodes near the large veins in the abdomen or pelvis, it can obstruct blood flow and cause swelling in one or both legs. Blood clots are also more common in cancer patients, so unexplained leg swelling should be reported to a doctor.
11. Infertility or Changes in Semen
Some men discover testicular cancer after seeking treatment for infertility. Tumors can affect sperm production and testosterone levels. Changes in semen volume or quality, while having many possible causes, can occasionally be linked to an undiagnosed testicular tumor.
What to Do If You Notice Any of These Symptoms
First: take a breath. We talk to thousands of guys a year who are in exactly this position — they've found something, or felt something, and they're scared. That's normal. The vast majority of testicular lumps and pain turn out not to be cancer. Conditions like epididymitis, hydroceles, varicoceles, and spermatoceles are far more common. But the only way to know for sure is to see a doctor. And if it does turn out to be something, you'll be glad you didn't wait.
Step 1: Do a Self-Exam
If you haven't already, perform a testicular self-exam. The best time is after a warm shower when the scrotal skin is relaxed. Roll each testicle gently between your thumb and fingers, feeling for any hard lumps, changes in size, or areas of tenderness.
Step 2: See Your Doctor Promptly
Don't wait to see if a symptom resolves on its own. See a doctor as soon as you can — especially if you've found a lump, have persistent pain, or notice swelling. Your doctor will likely perform a physical exam and order an ultrasound of the scrotum. Ultrasound is painless, non-invasive, and highly accurate at distinguishing cancerous masses from benign conditions.
Step 3: Get Blood Work
Your doctor may order blood tests for tumor markers, including AFP (alpha-fetoprotein), hCG (human chorionic gonadotropin), and LDH (lactate dehydrogenase). Elevated levels of these markers can support a diagnosis, though not all testicular cancers produce them.
Step 4: Don't Delay Treatment
If cancer is confirmed, treatment typically begins with an orchiectomy (surgical removal of the affected testicle). When caught in Stage 1, outcomes are excellent — and even in more advanced stages, testicular cancer generally responds well to treatment. Your care team will walk you through every step.
Who Is Most at Risk?
While testicular cancer can affect any male, certain factors increase risk:
- Age: Most common between ages 15 and 35, though it can occur at any age.
- Undescended testicle (cryptorchidism): Men born with one or both testicles that didn't descend into the scrotum have a higher risk, even if the condition was surgically corrected.
- Family history: Having a father or brother who had testicular cancer increases your risk.
- Previous testicular cancer: Men who've had cancer in one testicle have about a 2–3% chance of developing it in the other.
- Race and ethnicity: Testicular cancer is more common in white men than in Black, Hispanic, or Asian men, though it can affect anyone.
- HIV/AIDS: Some research suggests a slightly elevated risk in men with HIV.
Testicular Cancer Symptoms vs. Other Conditions
Many men find a lump or feel pain and immediately fear the worst. It's helpful to know how testicular cancer symptoms compare to other common conditions:
| Condition | How It Feels | Key Difference from Cancer |
|---|---|---|
| Testicular cancer | Hard, painless lump attached to testicle; heaviness | Lump is firm, fixed, and doesn't transilluminate (light won't pass through it) |
| Epididymal cyst / Spermatocele | Smooth, fluid-filled lump behind or above the testicle | Feels separate from the testicle; soft and movable; transilluminates |
| Epididymitis | Painful, swollen area behind the testicle; often comes on suddenly | Usually painful (cancer lumps often aren't); may include fever, burning urination |
| Varicocele | Feels like a "bag of worms" above the testicle; aching | Enlarges when standing, shrinks when lying down; no hard lump |
| Hydrocele | Painless swelling of the entire scrotum; fluid-filled | Swelling surrounds the testicle rather than being a distinct lump; transilluminates |
| Inguinal hernia | Bulge in the groin that may extend into the scrotum | Bulge can often be pushed back in; worsens with coughing or straining |
Remember: This table is for reference only. You cannot diagnose yourself by feel alone. An ultrasound is the most reliable way to determine what a lump is.
Frequently Asked Questions
What does testicular cancer feel like?
The most common sensation is a hard, painless lump on the testicle itself. Some men also feel heaviness in the scrotum, a dull ache in the lower abdomen or groin, or general discomfort in the affected testicle. Many men report that the cancer "didn't feel like anything" at first and was found incidentally.
Can testicular cancer be painless?
Yes. In fact, most testicular cancers present as a painless lump. This is one of the reasons regular self-exams are so important. The absence of pain does not mean the absence of cancer.
What are the first signs of testicular cancer?
The earliest sign is usually a small, hard lump on the testicle or a change in how the testicle feels (harder, larger, or heavier). Some men notice a dull ache in the lower abdomen or groin before they find a lump.
Can you have testicular cancer without a lump?
Yes, though it's less common. Some men present with pain, swelling, heaviness, or hormonal symptoms (like gynecomastia) without a palpable lump. In some cases, the tumor is inside the testicle and not easily felt from the outside.
How fast does testicular cancer grow?
It depends on the type. Non-seminomas (including embryonal carcinoma and choriocarcinoma) tend to grow more quickly than seminomas, which are generally slower-growing. Either way, prompt evaluation is important, as even slow-growing tumors benefit from early treatment.
At what age should I start doing self-exams?
The Testicular Cancer Foundation recommends monthly self-exams starting at age 15. Learn how with our step-by-step self-exam guide.
What should I tell my doctor?
Be specific about what you've noticed: the location of any lump, when you first felt it, whether it has changed, and any associated symptoms (pain, heaviness, swelling). Don't downplay your concerns. Your doctor will typically order an ultrasound as a first step.
Is testicular cancer curable?
Yes. Testicular cancer has one of the highest cure rates of all cancers. Outcomes for early-stage cases are excellent, and even in more advanced stages, many men are successfully treated with a combination of surgery and chemotherapy. The specifics depend on the type and stage, so talk to your doctor about what your individual situation looks like.
Take Action Today
Knowing the symptoms is the first step. The next step is making self-exams a monthly habit. If you notice anything unusual, see a doctor. Early detection saves lives, and testicular cancer is one of the most treatable cancers when found early.
Your Next Steps:
- Learn how to do a self-exam → testicularcancer.org/testicular-cancer-self-exam
- Found something? See a doctor as soon as you can.
- Share this page with a man you care about.
Medically reviewed content. Last updated: April 2026. Published by the Testicular Cancer Foundation (testicularcancer.org).
