There are two reasons for the recurrence of anal fistula surgery: first, incomplete surgery; second, the re-infection of the situation. The purpose of anal fistula surgery is to cut the fistula as well as fistula treatment, some anal fistula symptoms will show two and more than two fistulas, in the anal fistula surgery if the fistula resection is incomplete residual fistula, these residual fistulas are susceptible to bacterial infection, and once again appear purulent lesions, resulting in the possibility of anal fistula recurrence. After anal fistula surgery, if the patient does not pay attention to improve the diet and lifestyle habits, leading to the end of the rectum again bacterial infection or the formation of perianal abscess symptoms, will lead to anal fistula recurrence phenomenon, so the surgical treatment of anal fistula is not a one-off, usually pay attention to the control of triggering factors is the key.