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 testes and epididymis is affected, and the supply of nutrients and oxygen needed by them is lacking, which affects spermatogenesis; due to the rise of local temperature inside the scrotum, the blood supply and oxygen supply of testes are insufficient, which affects the endocrine function of interstitial cells inside the testicular varicocele and interferes with spermatogenesis; the veins inside the spermatic cord The presence of substances that impair testicular function, such as hormonal 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.