The indications for varicocele surgery are mainly for patients with severe clinical symptoms and affected sperm quality. 1. Severe clinical symptoms: some patients with insignificant clinical symptoms or mild scrotal swelling discomfort can be temporarily treated conservatively by taking intravenous active drugs to promote symptomatic relief. For patients with particularly pronounced scrotal distension and pain, the effect of formal conservative treatment is not good, surgery will be recommended. 2. Sperm quality is affected: the stagnation of venous blood under the influence of the lesion will lead to the elevation of testicular temperature, the accumulation of testicular CO2, and the elevation of the concentration of cortisol and prostaglandins, which will affect the quality of sperm, and lead to the occurrence of infertility, which will require early surgical treatment to promote the restoration of the quality of sperm. Surgical options first recommend microscopic spermatic vein ligation.