The child’s stomach pain and want to vomit may be related to gastroenteritis, ascariasis, intussusception and so on. 1. Gastroenteritis: when children eat unclean, cold, spicy and stimulating food, the gastrointestinal mucosa is stimulated by bacteria and its toxins, which can cause gastrointestinal inflammation, abdominal pain, vomiting, and in severe cases, vomiting blood. 2. Ascariasis: there are often symptoms of digestive disorders such as irregular abdominal pain, nausea and vomiting, and heterophagia. Children have a history of vomiting and excreting worms, and eggs can be detected in feces. Due to the improvement of existing sanitary conditions, the disease has been significantly reduced. 3. intussusception: refers to part of the intestinal tube and its mesentery into the adjacent intestinal lumen caused by a kind of intestinal obstruction, prevalent in infants and young children less than 2 years old, the performance of a sudden onset of severe paroxysmal colic, lasting a few minutes can be relieved, accompanied by vomiting, abdominal can be touched with a folded weenie-like mass. The child’s stomach pain and want to vomit, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment.