A varicocele is swelling in the scrotum due to a back up of blood in the main veins of the testicles.

Not all varicoceles require treatment. Varicoceles that interfere with fertility, cause pain, or cause other problems may require surgery.

Varicocele
testicle varices
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A varicocele is caused by a problem in the main vein of the testicle. Blood normally leaves the testicle through the spermatic vein. When this vein is not working properly, the blood gets backed up and the veins bulge.