After circumcision may appear local redness, swelling and pain, wound infection, delayed wound healing, local scar formation hazards. 1. Local redness, swelling and pain: local redness, swelling and pain will occur within a few days after circumcision, which is normal, and will be gradually relieved after regular disinfection. 2. Wound infection: after the circumcision, do not pay attention to hygiene and disinfection, will cause wound infection, serious swelling and pain, pus and other symptoms. 3. Delayed wound healing: Delayed wound healing can be caused by repeated infections that are not well controlled or by sexual stimulation. 4. Local scar formation: some patients will have different degrees of scar tissue after circumcision. The symptoms of infection after circumcision, need to go to the hospital in time for examination and treatment, in addition to diet to avoid spicy stimulation greasy food.