Circumcision refers to circumcision. Whether or not the penis increases in size after circumcision is related to age, and after circumcision in adolescents, the restriction of penile growth caused by the foreskin or prepuce will be lifted, which is conducive to the enlargement of the penis. For adults, there will be no significant change in the penis after circumcision. 1. Adolescents: Adolescents who are circumcised will affect the development of the penis, which will develop normally after circumcision. Even if there is no phimosis or circumcision in adolescents, the penis itself is at a normal stage of development. 2. Adults: For adults after circumcision, the size of the penis will not change because the penis has already matured. Some patients may feel that their penis is bigger after circumcision due to visual error. It is recommended that patients go to a regular tertiary hospital for urology circumcision, and pay attention to the prevention of postoperative infections.