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