Varicocele is a tortuous, dilated vein within the spermatic cord. The symptoms of varicocele have no correlation with the size of the spermatic vein’s internal diameter, and a varicocele of 2.6 mm can be asymptomatic. Surgery can be considered for treatment if symptoms appear or if it leads to male infertility. Varicocele is the abnormal expansion, elongation and tortuousness of the veins in the spermatic cord, the exact cause of the disease is not clear, mostly occurring on the left side, usually no symptoms, easy to ignore, mostly found in the physical examination, which can lead to the affected side of the scrotum, accompanied by a feeling of bloating, symptoms worsened by long time walking or long time standing, and the symptoms will be relieved when lying down, the symptoms of the varicocele have no correlation with the size of the spermatic vein, the severe varicocele may not have any symptoms, and the spermatic cord can also have no symptoms. The symptoms of varicocele do not correlate with the size of the spermatic veins. If the varicocele is asymptomatic or if there are no problems with semen, treatment is usually not needed. Surgery may be considered if the varicocele causes recurrent symptoms or leads to semen abnormalities that result in male infertility.