Although it's one of the less common forms of cancer, testicular cancer is still pretty scary — especially because, compared to other types of cancer, it's more likely to strike the younger you are. "Testicular cancer is the most common cancer in men aged 15 to 35," says Timothy Gilligan, M.D., a testicular cancer medical oncologist at Cleveland Clinic. In fact, 79 percent of all cases of testicular cancer occur in men 44 or younger, according to the National Cancer Institute’s Surveillance, Epidemiology, and EndResults Program (SEER).

The good news? Testicular cancer is extremely treatable. “For every 100 men diagnosed with testicular cancer, 96 are cured," says Dr. Gilligan. If you catch it early in its localized stage (meaning, the cancer hasn’t yet spread to lymph nodes or other organs), your chances of beating it are even higher. About 99 percent of men diagnosed with localized testicular cancer survive five years or more, according to SEER data.

In many cases, testicular cancer is caught early because you notice its most common symptom — the presence of a lump on your testicle. But that's not the only sign you should be aware of. Here are the less obvious signs and symptoms of testicular cancer you need to know.