Anal fistula is considered when there is mucus oozing from the anus. The clinical manifestations of anal fistula are repeated purulent, or mucus discharge, or even fecal water, from the perianal area. In some people, the mucus discharge constantly irritates the skin around the anus, causing itching and a particularly strong odor. Anal fistula requires surgery, and it takes about one and a half months for the wound to heal after surgery. In the first half month after surgery, the feeling of swelling and pain in the anal area is obvious, the discharge is particularly large and the perianal area is moist, which is a normal condition. As the wound gradually heals, the pain and swelling will disappear and the discharge will gradually decrease. After surgery, you should take more rest, avoid exercise, eat a light diet, prohibit alcohol consumption, eat more vegetables and fruits to promote stool discharge, and develop good bowel habits.