A testicle lump that does not hurt may be a sign of cancer. Most cases of testicular cancer occur in men ages 15 to 40. It can also occur at older or younger ages.

Causes of Testicle Lump
Possible causes of a painful scrotal mass include:
-- A cyst-like lump in the scrotum that contains fluid and dead sperm cells (spermatocele)
-- Epididymitis
-- Infection of the scrotal sac
-- Injury or trauma
-- Mumps
-- Orchitis (testicular infection)
-- Testicular torsion
-- Testicular cancer
-- Varicocele

Prevention of Testicle Lump
Starting in puberty, men at risk for testicular cancer may be taught to do regular exams of their testicles. This includes men with:
-- A family history of testicular cancer
-- A past tumor of the testicle
-- An undescended testicle, even if the testicle on the other side has descended

If you have a lump in your testicle, tell your health care provider right away. A lump on the testicle may be the first sign of testicular cancer. Many men with testicular cancer have been given a wrong diagnosis. Therefore, it is important to go back to your provider if you have a lump that doesn't go away.