Circumcision does not normally make the penis smaller. Circumcision is simply the removal of excess foreskin, which can reduce the retention of dirt. After circumcision, it can reduce the incidence of circumcision and glansitis, as well as reduce the sensitivity of the glans and prolong the sexual life. Circumcision is the circumcision of the foreskin, which cuts off the excessive foreskin of men to make the foreskin of the right length. Before circumcision should be checked, there is no coagulation function abnormalities and other conditions, and pay attention to local hygiene, wear clean clothes, wash the lower body, if necessary, can remove pubic hair, to minimize the occurrence of infection. Patients with long foreskin or prepuce, should go to a regular hospital for consultation and treatment, after diagnosis with a specialist doctor for treatment. After the operation should also strengthen all aspects of care, to avoid postoperative infection.