The phenomenon of indigestion and stomach pain is mainly caused by indigestion and some gastrointestinal diseases. First of all, indigestion can cause difficulty in defecation and stomach pain, because indigestion makes a large amount of food can not be completely decomposed, resulting in a large amount of food residues mixed in the stool, which adds great difficulty to defecation and can easily cause the symptoms of defecation, which can not be discharged in time will be retained in the intestines, causing abdominal distension and abdominal pain. Secondly, the symptoms caused by intestinal diseases, especially intestinal obstruction and intussusception, can seriously hinder the normal passage of feces, resulting in feces not being discharged in a timely manner and causing gastrointestinal discomfort. Finally, uncontrolled diet and unhygienic diet can also cause this symptom.