The main purpose for people to soak potassium permanganate after circumcision is to disinfect and prevent postoperative edema. Potassium permanganate has strict requirements on the concentration of preparation and it is recommended to operate under the guidance of a doctor or pharmacist. The area around the incision after circumcision is more difficult to clean and prone to postoperative infection. Therefore, it can be effectively cleaned with a disinfectant solution. Low concentration of potassium permanganate cleaning solution is less irritating and does not cause any damage to the body. It can be used for a few days after the operation to disinfect and prevent edema. High concentrations of potassium permanganate are damaging to the skin, and skin exposed to too high a concentration of potassium permanganate can break out, become painful and other uncomfortable symptoms. Therefore, it needs to be used under the guidance of a doctor.