Anal pain in children is common in the following cases: 1. Anal fissure. Because the baby is constipated, thus causing difficulty in stool, so that the mucous membrane around the anus rupture, anal pain, sometimes there will be fresh blood at the end of the stool appears, need to adjust the diet, less spicy, stimulating food, eat more food rich in coarse fiber, such as celery, spinach, fungus, moderate amount of coarse grains, etc. 2, congenital anal stenosis. It will be accompanied by constipation, abdominal distension, crying obviously during stool, need to go to the hospital for anal diagnosis to clarify, if necessary, anal dilation treatment. 3, parasitic diseases. The most common is pinworm infection, which can be itchy around the anus, and the baby cannot describe it correctly, and will complain of pain, which requires a routine stool test at the hospital, or white adult worms can be seen around the anus at night after the baby falls asleep.