Potassium permanganate solution can be used to assist in the treatment of anal fistulas to prevent infection, but usually does not result in a cure. For anal fistula patients usually need surgical treatment, the use of potassium permanganate solution, can not make anal fistula patients cured, but anal fistula patients can use potassium permanganate solution sitz bath before and after the operation. Potassium permanganate solution has a certain degree of oxidizing properties, it can kill bacteria, before the operation can reduce the symptoms of infection, after the operation can prevent their own wound infection. Anal fistula is recommended to go to the regular hospital anorectal department standardized treatment, and potassium permanganate and other drugs should be used correctly under the guidance of a doctor, use of attention to the preparation of the concentration and the temperature of the sitz bath to be appropriate.