The harms of varicocele are mainly manifested in the following aspects. The first aspect is that varicocele causes a sensation of dragging pain in the testicles, affecting the patient's normal work and life. The second aspect is that due to the presence of varicocele, there is a decline in the quality of male semen, which affects male fertility. The third aspect is that if the varicocele is severe and persists for a long time, it may lead to testicular atrophy, resulting in a decrease in the level of testosterone secretion by the testicles, which reduces male sexual function. Therefore, patients with varicocele, especially those with decreased semen quality, should actively seek surgical treatment, which currently mainly involves high ligation of the spermatic vein.