Tummy ache in children aged 7-12 years old can be treated according to different causes. Causes of tummy ache in children may include indigestion, constipation, acute appendicitis and so on. 1. Indigestion: Diet needs to be kept light, do not eat spicy and stimulating food. Abdominal massage can be appropriate to relieve the symptoms. 2. Constipation: You can eat more fresh fruits and vegetables as appropriate. Usually need to carry out appropriate exercise, promote gastrointestinal peristalsis, relieve the symptoms of constipation. 3. Acute appendicitis: usually need timely surgical treatment. There are many other reasons why children aged 7-12 years old have stomach pains, so they should go to the hospital in time for examination, clarify the cause of the disease, and then actively carry out treatment. Usually need to pay attention to keep the diet light, reduce the stimulation of the stomach and intestines.