A 7-year-old child’s stomach pain and vomiting may be caused by unhygienic diet, acute enteritis, intussusception and so on. 1. unhygienic diet: if the child eats some unhygienic food, resulting in gastrointestinal dysfunction, which leads to the child’s stomach pain and vomiting. 2. Acute enteritis: if there are bad dietary habits, allergies, and bacterial and viral microbial infections and other factors, the child mainly manifests diarrhea, nausea, abdominal pain, loss of appetite and other symptoms, and severe dehydration, electrolyte disorders and so on. 3. Intussusception: The child suffers from stomach pain and vomiting because a section of intestinal tube is trapped in the intestinal tube connected to it, which leads to the obstruction of the passage of intestinal contents. Parents are advised to bring their children to the hospital in time, under the diagnosis of the doctor, according to the specific condition of the child, to take targeted programs for treatment.