The causes of abdominal pain and vomiting are mainly the following: First, acute gastroenteritis. If the patient shows abdominal pain, pain around the umbilicus, vomiting, diarrhea, fever and other manifestations, the considered is acute gastroenteritis. Second, cholelithiasis. Patients with cholelithiasis often show pain in the right upper abdomen, accompanied by vomiting, acid reflux, belching and other discomforts, and sometimes fever, etc. In this case, patients must be advised to further investigate the upper abdominal CT and routine blood tests. Third, consider intestinal obstruction. Patients with intestinal obstruction often show vomiting, abdominal pain and discomfort, abdominal distention, and inability to pass stools. Once intestinal obstruction is suspected, patients must be advised to improve abdominal standing films, abdominal CT and other examinations. Fourth, consider the possibility of intestinal inflammation. Intestinal inflammation is often manifested as fever, abdominal pain and vomiting. Therefore, for abdominal pain and vomiting, diseases from the above aspects are often considered.