Here's some good news about testicular pain: It's rarely a symptom of testicular cancer. Only 1 out of 10 men with testicular cancer feels pain [source: James Buchanan Brady Urology Institute]. Instead, it's usually detected when you or your doctor feels a lump. But for 10 percent of men, testicular pain is a sign that a cancerous tumor has developed on a testicle. It may not even be painful -- your testicles may just feel uncomfortable or heavy, or become visibly larger and swollen.
Those symptoms, in addition to pain in the lower back or abdomen, fluid collecting in the scrotum, and tenderness in the chest, add up to something that needs to be checked out. A good rule of thumb: If you feel, see or notice any change in anything in, on or around your testicles, see a doctor. When it comes to testicular cancer, early detection is incredibly important.
Next: An unwelcome twist to this testicular tale.