The early stage of anal fistula will appear generally pus flow next to the anus, perianal itching, perianal pain, systemic manifestations and other symptoms, but there is no such thing as 6 early symptoms of anal fistula. 1. Para-anal pus: pus discharge, fecal water, pus and blood from the external mouth, sometimes more or less, polluting the underwear. 2. Perianal itching: the secretion from the external port causes irritation to the surrounding skin, causing localized itching of the skin, and eczema, or even erosion, redness and swelling will occur if the symptoms are severe. 3. Perianal pain: intermittent closure of the external port, dirt constantly flowing into the fistula to the external port, will form pus, lumps, redness, swelling, pain and other inflammatory reactions. 4. systemic symptoms: if the complex anal fistula, tuberculous anal fistula, will appear wasting, anemia and other symptoms. If the above fistula related symptoms, it is recommended that the patient timely consultation, identify the cause of the disease, give reasonable standardized treatment. It is recommended that patients with anal fistula surgery as soon as possible, because anal fistula must ultimately be cured by surgery to be completely treated.