More than two months after anal fistula surgery, the wound scar is still pus may be due to postoperative infection, anal fistula recurrence, perianal abscess and other reasons. 1. Postoperative infection: improper care after anal fistula surgery can lead to inflammation of the wound. The patient will have localized pain, weakness, fever and so on. Repeated inflammatory stimulation will lead to non-healing or poor healing of the wound, as well as the flow of pus. 2. Anal fistula recurrence: pus from the scar more than two months after anal fistula surgery may be due to the recurrence of anal fistula, which will cause the patient to have localized pain, secretion of bloody, purulent, mucous secretion, accompanied by itching and other symptoms. 3. Perianal abscess: perianal abscess is mainly due to infection, some patients are traumatized in the anus can also cause perianal abscess, will cause swelling in the anus, pain, local rupture will cause the symptoms of pus. After anal fistula surgery more than 2 months after the wound scar pus, it is recommended that the patient should go to the hospital as soon as possible for examination, clear cause, standardized treatment under the guidance of the doctor, so as not to delay the condition.