A major symptom/sign of varicocela is male sterility. An enlarged testicular vein vessels (varicocela) has a negative impact on spermatozoid production (spermatogenesis) because increased blood flow increases the local temperature. Slight pain might be also present during varicocela. Varicocella is diagnosed through a physical examination (palpation) of the local are and an ultrasound. You can proceed to an urologist for further medical attention.