Abdominal pain can not find the cause of the main consideration of functional dyspepsia, irritable bowel syndrome, chronic enteritis. 1. Functional dyspepsia: mainly manifested as postprandial fullness, early satiety, epigastric distension, burning sensation, belching, loss of appetite, etc., abdominal pain is a common symptom, and there is no abnormality in laboratory tests and imaging tests. 2. Irritable bowel syndrome (IBS): a functional gastrointestinal disease mainly characterized by abdominal pain and change in bowel habit, with no organic changes and no abnormalities in routine examination. 3. Chronic enteritis: patients due to poor gastrointestinal function, or dietary inattention, often eat cold and irritating food, resulting in frequent abdominal pain after meals, and no organic changes. Abdominal pain can not find the cause of other possibilities, patients should consult a doctor in a timely manner to clarify the cause of the disease, and comply with the doctor’s instructions to standardize the treatment, so as not to delay the condition.