The causes of upper abdominal pain in small children can be divided into several kinds: 1, abdominal pain caused by intestinal cramps, because of cold or overeating, eating and drinking raw and cold food and beverages, etc., and abdominal pain caused by constipation is also a common cause.2, acute abdominal disease, including acute intestinal obstruction, intussusception, abdominal trauma and so on. Biliary colic, renal colic performance is sudden abdominal pain, the degree of intense, can be accompanied by vomiting and fever. 3, non-acute abdominal disease, if the baby abdominal pain occurs in the meal or before the meal, the pain occurs at the same time also accompanied by nausea, vomiting. Moms and dads need to be alert to acute gastritis, gastric ulcer, duodenal ulcer and other conditions, gastritis caused by gastroparesis is the most common cause of epigastric pain in children. When the abdominal pain appears to recur periodically, we should be highly alert to duodenal ulcer, gastric ulcer, as soon as possible to take the child to the hospital for appropriate examination and treatment.