what can cause swollen testicles?
1 Varicocele is another condition that causes swollen testicles. This condition happens when the blood flow along the spermatic cord is obstructed. Varicocele is not dangerous but it could cause discomfort especially when the man is at his upright position.  Hydrocele is also a common cause of swelling testicles.
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: Spermatocele or the development of fluid-filled cysts in the epididymis. The epididymis is a small coiled tube located in the upper side of the testicle that transports and collects sperm.
Swollen testicles, or a sensation of a fullness in the testicle, can also be caused by an inguinal hernia. Inguinal hernias occur when part of the intestine becomes displaced, slipping through the inguinal canal into the testis.