Circumcision is also known as circumcision surgery, small penis can do circumcision surgery, to comprehensive personal situation to judge, such as boys under 5 years old small penis temporarily do not need to do circumcision surgery, small penis along with the incarceration of the foreskin caused by the swelling of the glans, it is recommended to do circumcision surgery. Boys under 5 years of age with small penis development, usually no abnormal symptoms temporarily do not have to cut the foreskin, with age, the penis will gradually grow and develop, the penis will grow faster than the foreskin, most of the foreskin will naturally recede upward to achieve the effect of complete self-healing, and do not have to do circumcision after the return to normal. Older men or boys, although the development of the penis is relatively small, but due to the long foreskin or prepuce caused by the foreskin inlaid, there is swelling of the glans or affect the urination of patients, it is recommended to do circumcision. Whether to do circumcision should go to the hospital for examination and let the professional doctor judge.