Baby anal itch may be caused by improper diet, perianal eczema, pinworms and other reasons. 1. Improper diet: babies eat too much spicy, stimulating food, in the process of defecation, the residue of these foods may be on the anal canal, anus and other parts of the skin caused by certain stimuli, which can cause the baby anal itchy symptoms. 2. Perianal eczema: perianal eczema is generally an allergic reaction caused by dietary spices, foreign body contact and other factors, usually itchy symptoms. 3. Pinworms: pinworms parasitic in the intestinal tract, can crawl out through the anus, causing the baby anal itching. When the baby anal itch, it is recommended to go to the hospital to do the relevant examination, clear cause, targeted treatment. At the same time, need to pay attention to local hygiene, and diligently change the baby diaper or underwear.