Tummy pain in five-year-old babies may be caused by acute gastroenteritis, indigestion or gastrointestinal cramps. 1. Acute gastroenteritis: most of them are caused by unclean diet, which usually manifests as abdominal pain, accompanied by nausea, vomiting, diarrhea, fever and other symptoms. 2. Indigestion: children in the case of overeating, may increase the burden on the stomach and intestines, if there is a slowdown in gastrointestinal peristalsis, will cause indigestion, abdominal distension, abdominal pain symptoms. 3. Gastrointestinal spasm: there is a certain relationship with the gastrointestinal tract accumulation of gas, cold, or hunger and other environmental stimuli, resulting in paroxysmal abdominal pain caused by strong contraction of the intestinal wall muscles, causing gastrointestinal spasms and other conditions. Five-year-old baby stomach pain may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.