In general, a circle of edema after undergoing circumcision may be normal, or the swelling may be caused by infection and other factors. 1. Postoperative wound edema: post-circumcision edema may be normal, edema may appear at the circumcision incision. Usually the edema will disappear slowly, do not worry too much. 2. Infection: After circumcision, if you don’t pay attention to the care of the wound area, such as not changing the medicine regularly, it may cause bacterial growth and infection, which may cause swelling, and may be accompanied by symptoms such as elevated skin temperature and pain. Therefore, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and treat it promptly.