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.
There are several causes of testicular lumps and swellings: 1  varicocele: caused by enlarged veins in the testicles (may look like a bag of worms) 2  hydrocele: a swelling caused by fluid around the testicle. 3  epididymal cyst: a lump caused by a collection of fluid in the epididymis.