Itching inside the anus is considered to be a result of the following possibilities: 1. It may be caused by anal parasites, especially pinworms, which live in the anus of the patient, and at night, due to the relaxation of the sphincter, the pinworms will crawl outside the anus to lay eggs, and the symptoms of itching will occur. 2. It may be caused by internal hemorrhoids, which in severe cases may cause itching, pain, prolapse of the hemorrhoid nucleus outside the anus or stuck in the anus, and bleeding. and bleeding and other symptoms. It is a good idea to use localized Ma Yinglong hemorrhoid suppositories, or take oral acacia flower powder or hemorrhoid speeding tablets for treatment. 3. It may be caused by a perianal abscess, which can be itchy, with fluctuating pressure, thick skin and pus. 4. It may also be caused by an anal fistula or anal fissure, and it is best to go to the hospital for differentiated treatment.