Varicocele is mostly seen in adult men between 20 and 30 years old. In this period, men’s sexual organs are mature, sex hormones and other related hormones (such as adrenaline) secretion is strong, so the sexual function is active, sexual impulses are easily stimulated, which can become the triggering factors of varicocele. 1.Initial symptom: The initial stage of varicocele can be completely asymptomatic, and it is usually difficult to detect, but only during the examination can be found. 2.Mid-term symptoms: the affected scrotum or testicles have a feeling of swelling or pain, the scrotum is enlarged, the affected scrotum and testicles are lower than the healthy side when standing, the scrotal surface can be seen as dilated and tortuous veins. The scrotal surface can be seen as dilated and tortuous veins. There are earthworm-like soft masses when touched, and the symptoms can be reduced or disappeared by lying down. 3, systemic symptoms: patients may have symptoms of neurasthenia, such as headache, fatigue, hypersensitivity, etc. Some patients have sexual dysfunction. 4.Infertility: varicocele can sometimes affect fertility. Varicocele can make 9% of people infertile and 39% of male infertility is caused by varicocele. Severe cases can cause testicular atrophy. This is caused by an increase in the temperature of the affected scrotum, which is reflected to the opposite side, causing degeneration and atrophy of the spermatogonia and a decrease in the number of spermatozoa, or by the return of pentraxin or steroids from the left adrenal gland to the testes via the left internal spermatic vein, causing a decrease in the number of spermatozoa. These are the common symptoms of varicocele, and it is recommended that men must pay attention to regular medical checkups for early detection, and it is also recommended that patients must be actively treated to prevent varicocele from affecting male fertility.