Itchy anus may be caused by perianal eczema, hemorrhoids, anal fistula and other reasons, according to the cause of the general treatment, drug treatment, surgical treatment and other methods of treatment. 1. Perianal eczema: the cause of perianal eczema is unknown, may be related to heredity, allergies, gastrointestinal dysfunction and other reasons, usually appear anal erythema, papules, with itching, pain and other symptoms. Patients should first keep the local dry, clean, under the guidance of the doctor to use mometasone furoate and other glucocorticoid drugs, but also oral antihistamine drugs such as loratadine treatment. 2. Hemorrhoids: Hemorrhoids are often caused by sedentary lifestyle, poor dietary habits, long-term alcohol consumption, etc., and may cause blood in the stool, anal itching and other symptoms. Patients can apply warm water or diluted potassium permanganate solution sitz bath under the guidance of the doctor, allergy to drugs is prohibited; at the same time, also need to follow the doctor’s instructions to take the external peeling and internal ligation, sclerotherapy and other surgical methods of treatment. 3. anal fistula: also known as anorectal fistula, anal fistula is often caused by perianal abscess untreated, there will be anal itching, pus, fistula out of defecation, defecation and other symptoms. Patients need to be treated with sensitive antibiotics under the guidance of a doctor, and also need to take the anal fistula incision, fistula resection and other ways of treatment. It is recommended that patients with paranal itching go to the hospital in a timely manner, after a clear diagnosis under the guidance of the doctor, reasonable and standardized treatment.