For fever and stomach pain, it is important to consider gallbladder infection, gastroenteritis, mesenteric lymphadenitis, pancreatitis, appendicitis and other infectious diseases of the abdominal cavity. If the patient has diarrhea and vomiting, pay attention to acute gastroenteritis, if there is obvious pain in the lower right abdomen and an increase in body temperature, pay attention to appendicitis, if there is pain in the upper right abdomen, aversion to greasy food and an increase in body temperature, pay attention to cholecystitis, gallstones and other diseases. If a child has recurrent abdominal pain, consider mesenteric lymphadenitis; if there is pus and blood in the stool with elevated body temperature, consider dysentery; if it occurs for a long time, also pay attention to ulcerative colitis and other diseases; if abdominal pain is accompanied by jaundice and elevated body temperature, also pay attention to liver disease or bile duct disease, abdominal pain, elevated body temperature and jaundice. If a patient has fever and abdominal pain, timely examination should be performed to determine the cause, abdominal ultrasound, routine blood tests, routine stool tests, and other related tests, etc. Patients with significant abdominal pain should not eat first, rest adequately, and check the change in body temperature in a timely manner, etc.