Abdominal pain in children can have many causes. It may be mild, such as constipation, gas, indigestion, or overeating, and anxiety.
Sometimes it may result from more serious causes such as appendicitis, gastroenteritis, food allergies, or bowel obstruction.
You must consult a doctor immediately if the pain is sudden or severe, or if it is accompanied by vomiting, blood in stool, high fever, or abdominal swelling that is tender to touch.