The specific common causes of tummy ache and fever in children are as follows: a. Tummy ache and fever can occur when there is acute gastroenteritis after eating improperly, such as acute gastroenteritis after eating too much food and strenuous activity or acute gastroenteritis after eating unclean food. Second, surgical diseases, such as acute appendicitis in children will also have symptoms of stomach pain and fever, it is best to go to the hospital for a detailed examination. If the inflammation is heavy, surgical treatment needs to be given under the guidance of a doctor. Third, common is pediatric mesenteric lymphadenitis, which is caused by some pathogenic bacteria infection resulting in swelling of lymph nodes around the intestine, and the child will have stomach pain and fever. Treatment is given according to the pathogenic bacteria and can be combined with abdominal physiotherapy in Chinese medicine to achieve a clinical cure.