A three-year-old child who cries out for stomach pain whenever he eats may be due to gastric ulcer, pyloric stenosis and other factors, which can be relieved by medication and surgical treatment. 1. Gastric ulcer: it is an ulcer on the inner wall of the stomach. The most prominent symptom of gastric ulcer in children is abdominal pain after meals, the pain usually lasts for a few minutes and this is recurrent. At this time, it can be treated by using drugs such as omeprazole and lansoprazole. 2. Pyloric stenosis: When the degree of pyloric stenosis is not too serious, although food can pass normally, the speed of passage may be reduced. When the next meal is eaten, because of the slow emptying speed may lead to the occurrence of obstruction and produce the feeling of abdominal pain. Pyloric stenosis can be treated with surgery such as pyloric annuloplasty. All of the above medications should be used under medical supervision and avoid self-medication. There are many other causes of this condition, you should go to the hospital in time, improve the relevant examination such as gastroscopy to clarify the cause of the disease, under the guidance of the doctor symptomatic treatment.