Circumcision generally does not cause significant harm, but there may be some postoperative complications, such as narrowing of the external circumcision, shortening of the foreskin tie, repeated friction between the glans and the underwear, and so on. 1. Narrowing of the external circumcision: especially for patients with scarred body, it is easy to form scar hyperplasia in the postoperative incision, resulting in narrowing of the external circumcision, which leads to pain when the patient’s penis is erected. 2. Shortening of the prepuce tie: After the patient’s circumcision surgery, it can cause the shortening of the prepuce tie, causing the patient’s penile erection pain, and even erection hardness is not enough. 3. Repeated friction between the glans and underwear: the patient’s circumcision scale is not in place, resulting in too much excision of the foreskin, which can easily cause the glans to be exposed to the outside, leading to repeated friction between the patient’s glans and underwear, which will cause redness, swelling and pain, and even glans infections may occur. Patients usually have discomfort, please go to the hospital in a timely manner, do not be careless, so as not to delay treatment.