Children’s stomach pain accompanied by fever may be caused by acute gastroenteritis, acute appendicitis, upper respiratory tract infection, mesenteric lymphadenitis and other diseases. 1. Acute gastroenteritis: children due to poor resistance, unclean diet will lead to bacterial and viral infection of the intestinal tract, causing acute gastroenteritis, resulting in fever, inflammation stimulation leads to gastrointestinal tract peristalsis and spasm, causing abdominal pain. 2. Acute appendicitis: appendicitis is caused by lymphoid follicular hyperplasia at the root of the appendix or fecal stone obstruction, which increases the tension of the appendix and leads to abdominal pain, and the severe symptoms of children can be aggravated by inflammation and lead to the emergence of systemic infections, such as fever, nausea, vomiting and so on. 3. Upper respiratory tract infection: upper respiratory tract infection can cause fever due to inflammation stimulation, upper respiratory tract infection can also cause gastrointestinal tract dysfunction in severe cases, thus causing abdominal pain. 4. Mesenteric lymphadenitis: highly prevalent in children, the typical symptoms of abdominal pain, may have fever, diarrhea and other symptoms. Children’s stomach pain accompanied by fever, there may be other reasons, should go to the hospital in a timely manner to improve the examination, identify the cause of the disease to give targeted treatment and treatment.