When the foreskin is longer than the coronal sulcus of the glans and covers more than 1/2 of the glans, it is called circumcision. If there is a narrow outer opening of the foreskin, so that the glans cannot be completely exposed, then it is called prepuce, the appearance of the inspection of the narrow outer opening, the glans only reveals a small part or completely can not be exposed. As long as you can do a good job of personal hygiene, wash in time, and dry the urine stains when you urinate, you can also do without surgery, but for patients with prepuce, surgery is recommended, because patients with prepuce may cause restrictions on the penis during the development process, resulting in poor development, and it is easy to hide prepuce and urine scale inside the foreskin. In addition, the incidence of penile cancer is significantly higher in patients with prepuce than in normal patients. Therefore, surgery is recommended for circumcision, while patients with simple prepuce can also be treated without surgery.