A spermatocele is a noncancerous cyst that develops in the epididymis, the coiled tube located behind the testicle where sperm are stored. It is filled with fluid that may contain sperm and can cause swelling in the scrotum. Spermatoceles are usually painless and don't cause any significant symptoms,

A varicocele is a swelling of the veins in the scrotum, similar to a varicose vein in the leg. This can cause discomfort and a heavy or dragging sensation in the scrotum, as well as low sperm count and decreased sperm motility. Varicoceles are common and occur in about 15% of all men and up to 40% of