There are usually no serious harms after circumcision, but when the surgery is not operated properly or hygiene is not taken care of after the surgery, complications such as wound infection, wound bleeding, delayed or non-healing of the incision, and localized scar formation will occur. 1. Wound infection: the operation process is not in strict accordance with the aseptic technology operation, postoperative wound contamination, etc., will lead to wound infection, local redness, swelling and pain. 2. Wound bleeding: avoid sexual stimulation in the short term after circumcision, sexual stimulation will lead to penile congestion, which will easily cause bleeding and pain in the wound. 3. Delayed healing or non-healing of the incision: If you don’t pay attention to local hygiene and disinfection after circumcision, it is easy to get infected again and again, causing delayed healing or even non-healing of the wound. 4. Local scar formation: after circumcision, there will be different degrees of scar formation, affecting the aesthetic appearance. After circumcision, we must pay attention to personal hygiene, avoid sexual stimulation, when there are symptoms of wound infection, we need to go to the hospital in time for treatment, in addition to pay attention to the diet of light, balanced nutrition.