Children’s itchy buttocks at night, considering that it may be caused by anal eczema, parasitic infection, allergic factors. 1. Anal eczema: children who usually do not clean up in time after defecation will cause persistent stimulation of the anal area, thus causing anal eczema, often accompanied by intense itching, especially at night when the itching is more obvious. 2. Parasitic infections: most commonly found in intestinal pinworms, due to fall asleep at night, pinworms will be discharged from the intestinal tract to the anus near the spawn, causing irritation around the anus, causing itching. 3. Allergic factors: for example, allergic to diapers or some items on the bed, it may cause itchy skin. Children’s itchy buttocks at night may also be caused by other reasons, should be timely to the hospital, to identify the cause of targeted treatment.