Epididymitis is swelling that occurs in the back of the testicle in the tube that carries sperm. Epididymitis most often causes pain, swelling and redness in one or both testicles. It is okay to exercise with epidymitis depending on what exercises you do.

When a man discovers that one or both of his testicles, or testes, is swollen and his scrotum has become enlarged, he might become extremely concerned. Several problems can cause testicular or scrotal swelling. Fortunately, most of these conditions can be successfully treated, especially if diagnosed early.