Abnormality of the blood vessels which drain the testis, a kind of varicose vein, nearly always occurring on the left side. The cause is increased pressure in the veins below the testicle, particularly when the patient is standing up. The patient often does not notice the vario-cele but sometimes suffers from a heavy feeling in the affected half of the scrotum, and a certain amount of pain. Varicolele is usually discovered when a married couple consults a doctor because they are childless. The temperature is somewhat higher than normal owing to the increased supply of blood to the testicle, and more hormones are supplied to the testicle from the adrenal gland. Both factors reduce the fertility of the sperm. Tying up the vessel supplying blood is the usual treatment for this form of infertility.