Children over two years old who have been constipated should go to a pediatric gastroenterology clinic. It is important to pay attention to whether the child has abdominal organ problems, and a color ultrasound of the abdomen should be done to find out what is going on in the abdomen. It should also be noted whether the child has food allergies involved, blood can be drawn to do allergen screening, if there is a positive allergen detection should be avoided allergic food intake. If constipation is due to dietary structure and eating habits, such as low intake of foods rich in crude fiber, and partial feeding, it is usually necessary to correct the habits of partial feeding, and eat more foods rich in crude fiber and fruits, and constipation will naturally be relieved. If none of the above problems are present, we should also pay attention to the presence of congenital megacolon or intestinal malformations and other surgical factors, then we need to see the pediatric surgery clinic, and may need to do a barium enema to clarify the cause of the disease, and then take effective therapeutic measures to address the cause of the disease.