The examination methods of stomach pain include: self-examination of stomach pain: most patients have mild symptoms or fullness, belching, acid reflux, heartburn, loss of appetite, nausea, diarrhea, etc., as well as recurrent bleeding in the upper gastrointestinal tract, vomiting of coffee-like substances, black stools, etc.; auxiliary examination: i. search for Helicobacter pylori through gastric fluid smear culture; ii. fiberoptic gastroscopy; iii. biopsy under the gastroscope; iv. barium X-ray; v. gastric fluid analysis. Gastric fluid analysis. The above examinations should be conducted by regular doctors.