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.
Common causes of testicle pain include: 1  Injury. 2  Infection or swelling of the sperm ducts (epididymitis) or testicles (orchitis) 3  Twisting of the testicles that can cut off the blood supply (testicular torsion). It is most common in young men between 10 and 20 years old.