The incidence of varicocele accounts for 15 ~ 30 years old male youth. 90% of them will occur on the left side, which is due to the congestion of spermatic vein, which leads to the expansion, winding and elongation of venous plexus. Kidney tumors may also cause varicocele. Varicocele deserves attention because it may be accompanied by testicular atrophy's disease and spermatogenesis disorder, leading to infertility.

It's better to have an operation early.