Varicocele is a common infertility condition in men. It is a condition in which the veins in the male spermatic cord become coiled and dilated due to obstructed reflux. Many men are unaware of the symptoms of varicocele and miss the best time for early treatment. The following are the symptoms of varicocele. Most of them have palpable symptoms, such as swollen blood vessels like earthworms that can be felt or seen from the scrotum. This kind of general affected scrotum or testicles will have a feeling of swelling or pain, because the scrotum is enlarged, so the affected scrotum and testicles are lower than the healthy side when standing, and the symptoms are more obvious when standing for a long time or abdominal exertion. 2, affect fertility, infertility. Among men with varicocele, 9% have symptoms of infertility, and 39% of male infertility is caused by varicocele. 3.Some of them also have symptoms related to neurasthenia, such as headache, weakness, hypersensitivity, etc.. Some of them may have sexual dysfunction, which may affect fertility. The common causes of varicocele 1, physiology The human body has been maintained in an upright position everyday, and the blood in the veins of the spermatic cord must overcome gravity to flow back upwards from below. 2.Anatomy The veins in the left spermatic cord near the veins of the left kidney usually have no valves, so the blood flows backwards easily. The internal vein is too long and injected into the renal vein at a right angle, and the blood flow will be subject to certain resistance. 3.Other renal tumors, retroperitoneal tumors and hydronephrosis can compress the veins in the spermatic cord and cause symptomatic or secondary varicocele. Varicocele can cause the following hazards 1, affect the mood: a few patients also have emotional instability, insomnia and dreaminess, mental depression, weakness and other neurological weakness. Some people may even have reduced libido, decreased sexual pleasure, painful intercourse, erectile dysfunction sexual dysfunction. 2, affect normal life: varicocele very affects normal work and life, the patient manifests as a feeling of swelling of the scrotum and testicles, wet and cold scrotum, swelling and pain, hidden pain, uncomfortable feeling also often radiates to the ipsilateral perineum, groin and waist, the symptoms will be aggravated after exertion, long time walking, strenuous exercise and sexual activity, and can be relieved after lying down and resting. 3, leading to infertility: varicocele can cause male infertility when it is serious. The stagnation of venous blood affects testicular metabolism, causing local hypoxia, stagnation of metabolic wastes, poisoning the spermatogenic cells and sperm of the testes, as well as inhibiting the production of the androgen – testosterone. The combined consequences of the two factors reduce the patient’s sperm count, low motility and increase the number of malformed sperm, thus can lead to male infertility.