Your body needs some sodium to function properly because it: 1  Helps maintain the right balance of fluids in your body. 2  Helps transmit nerve impulses. 3  Influences the contraction and relaxation of muscles.
Some of the conditions that can cause a testicle lump, swelling, and/or pain include: 1  Torsion of the testicle. 2  Injury. 3  Infection. Hydrocele. 4  Varicocele. Epididymal cyst/spermatocele.  Inguinal 1  hernia. Kidney  stones.
Some of the main causes are: 1  varicoceles â swellings caused by swollen and enlarged veins within the scrotum. 2  hydroceles â swellings caused by a build-up of fluid around the testicle. 3  epididymal cysts â lumps caused by a collection of fluid in the epididymis (a coiled tube behind the testicles) epididymo-orchitis â inflammation of the epididymis and testicles. inguinal hernias â where fatty tissue or a part of your bowel pokes through into your groin, which can cause the scrotum to become enlarged.