Anal fistula but no more inflammation, indicating that the anal fistula has belonged to the stabilization stage, there is no obvious inflammatory reaction. Anal fistula is a common disease in anus and intestines, usually caused by perianal abscess without timely treatment, spreading to the surrounding tissues. In the patient’s anal area, there will be intermittent or continuous flow of blood secretion, purulent secretion or mucus secretion. Patients will be accompanied by obvious pain, fever, anal moisture, local itching and other symptoms. If the diagnosis of anal fistula is confirmed, but there is no inflammation, it is considered that the anal fistula develops from the acute stage to the stable stage, and symptoms such as pain and hard nodules in the anus may occur. At this time, the fistula can be cut or excised through hanging thread therapy, anal fistulotomy, anal fistula excision and other surgical treatments to achieve the purpose of treatment. It is recommended that anal fistula patients seek timely medical treatment to avoid constant delays, which may lead to aggravation of the condition.