Gastrography refers to barium meal imaging of the upper gastrointestinal tract, which can be used to examine the esophagus, stomach and duodenum for lesions such as esophagitis, gastritis, gastric ulcers, and space-occupying lesions. After the patient takes barium, an abdominal X-ray is taken within a certain period of time, and lesions in the esophagus, stomach and duodenum can be seen through the development of the contrast agent. For example, the direct signs of barium in ulcers are niche shadows and mucosal aggregation, and the indirect signs are localized pressure and pain, narrowing, etc. For occupational lesions, the corresponding parts of the narrowing, disappearance of mucosa, and rigidity of the tube wall can be seen. Gastrography is usually used for patients who cannot do gastroscopy, such as those who cannot do gastroscopy because of cardiopulmonary diseases. If the patient has persistent abdominal pain and other symptoms after gastrography, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease and symptomatic treatment.