The dilatation, tortuosity, and elongation of the spermatic plexus are called varicocele. Varicocele is most common in young and strong men, with an incidence of about 15%. The main symptom is a feeling of swelling and vague pain in the scrotum, which can radiate to the lower abdomen and lower back, and is aggravated by prolonged standing or exertion. If the lesion is mild, it may be asymptomatic and detected only during physical examination. Varicocele is often an important cause of infertility, with 30-40% of male infertility being caused by varicocele. After varicocele, due to the stagnant blood flow in the spermatic vein, the temperature inside the scrotum can rise, which affects sperm production; the blood circulation of the testes and epididymis is affected, and the lack of nutrients and oxygen supply needed by them affects spermatogenesis; due to the local temperature rise inside the scrotum, the blood supply and oxygen supply to the testes are insufficient, which affects the endocrine function of the interstitial cells in the testicular varicocele and interferes with spermatogenesis; the veins inside the spermatic cord The presence of substances that impair testicular function, such as hormone-like substances from the kidneys and adrenal glands, such as cortisol, catecholamines and toxic metabolites, can inhibit testicular spermatogenesis. Therefore, regardless of the severity of the symptoms, they should be promptly investigated and treated in a hospital. However, not all people with varicocele are infertile, but it depends on the degree of damage to the testes.