Among the patients with clinical infertility, there is a part of the disease that cannot be ignored, varicocele. The so-called varicocele is caused by stagnation of blood flow in the spermatic veins due to incompetent venous valves or obstruction of blood flow, resulting in tortuous expansion of the trapezius plexus. It is mostly seen in unmarried men aged 20-25 years. Most of them are asymptomatic and are detected only during physical examination. In some patients, there is a sensation of scrotal cramping and pain in the left testicle, which can be aggravated by standing for a long time or walking for a long time. Severe varicocele can sometimes affect the ability of the testes to produce sperm. The degree of varicocele is divided into three levels. Mild: the varicose veins are not obvious on palpation and can only be felt when the patient holds his breath and increases abdominal pressure (Valsalva method); moderate: the varicose veins can be felt on palpation but have a normal appearance; severe: the varicose veins are like a mass of earthworms and are extremely obvious on palpation and visual examination. In this varicocele affects fertility for the following reasons: 1, blood depression affects metabolism, testicular temperature increases, and CO2 accumulates in testicular tissue. 2.Reflux of substances (catecholamines, cortisol, prostaglandins) from the kidneys and adrenal glands that are toxic to the testes. 3.Decrease in testosterone secretion causes damage to interstitial cells. 4.Epididymal damage in varicose veins causes sperm to gain less power to move forward and the speed decreases. 5.There are traffic branches between the spermatic veins on both sides, which affect the varicose lesion of the opposite spermatic vein. Varicocele has no major effect on health, and most of them can be cured by themselves after marriage. Once the disease, we should pay attention to rest, move and combine, and actively participate in some beneficial recreational activities. Patients with more serious disease, which may affect fertility, should go to the hospital for surgical treatment, that is, high ligation of the spermatic vein. If the symptoms are mild, the scrotum can be protected with a scrotal brace.