Without special reasons, circumcision is necessary for 30 years, and there is no obvious age limit for circumcision. If the foreskin is too long and can not be turned up normally after erection, it is easy to cause some urinary or reproductive system diseases. For circumcised patients, the inability to clean the inner plate of the foreskin, the coronal groove and the surface of the glans may cause urethritis, cystitis and even penile cancer and other urinary system diseases, and during sex, it may also cause edema, incarceration of the foreskin or even increase the risk of infection of the reproductive system of both parties. Early circumcision can reduce the risk of disease. Currently circumcision has a better prognosis, and patients are advised to go to the urology department of regular hospitals for circumcision.