There are a number of reasons why pain in or around the testicles might occur. The general rule of thumb is that any sudden and severe pain should be checked out immediately. The same applies to any lumps that are discovered or enlargement of one or both testicles.
Pain in the scrotum or testicles can be due to a problem in the testicle, in the structures surrounding the testicle or even in another part of the body.
Causes of testicular pain include:
Epididymitis
Hydrocele (fluid around the testicles)
Orchitis
Spermatocele; cyst filled with degenerated, liquefied sperm
Varicocele; varicose veins around the testicle
Injury directly or indirectly to the groin
Obstruction of blood supply to the testicle due to twisting of the spermatic cord (torsion) (more common in children)
Kidney stones or other causes of kidney blockage
Testicular tumor
Nerve irritation just below the ribs in the back may radiate pain into the groin and in your scrotum
Updated 03/13/2006