Mixed hemorrhoid surgery with potassium permanganate sitz bath can reduce perianal edema, promote wound healing. After hemorrhoid surgery, it is difficult to avoid the emergence of perianal tissue edema, pain, oozing, etc., while the patient is more painful. Permanganate is a strong oxidizing agent, will be diluted with warm water sitz bath, can improve the perianal wounds in the anaerobic environment, reduce edema, oozing, promote local tissue growth and healing. The use of potassium permanganate sitz bath is generally in accordance with the ratio of 1:5000 proportion of solution, the temperature will be controlled at about 40 ℃, told the patient after the stool and bedtime sitz bath fumigation, the time is about 15min / times. Although the method of potassium permanganate sitz bath is relatively simple and effective, but when using it, we must pay attention to its concentration can not be too high, otherwise it will cause skin damage; and the temperature of the sitz bath should be avoided to be too high, to prevent the skin from being burned.