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.
Swollen testicles can affect most men, but most of the causes are harmless and some of the swollen left testicle no pain is associated with it. The following are the usual causes of swollen testicles: 1  Spermatocele or the development of fluid-filled cysts in the epididymis. 2  The epididymis is a small coiled tube located in the upper side of the testicle that transports and collects sperm.