Anal pruritus is a common clinical condition with three main causes (1) allergy, (2) spicy dietary stimulation, and (3) inflammation of the intestinal tract with frequent small amounts of exudation from the anal verge, which irritates the skin. Therefore, the first thing to know about anal itching is whether there are symptoms of enteritis such as loose stools, and consider colonoscopy. When enteritis is controlled, itching will also be naturally reduced. Anal itching and enteritis, like chronic disease, with repeated fibrous delay characteristics, often affect the patient’s mood, bad mood and will aggravate the disease, therefore, patients should be prepared for long-term repeated thought, not anxiety, the disease faster, less attacks.