Gastrointestinal barium meal examination can understand the function and status of the stomach and intestines, and is mainly used for the examination of lesions in the esophagus, stomach, intestines and ileocecal region, such as diverticula, inflammation, ulcer, tuberculosis, tumor, congenital malformation, and esophagogastric fundic varices. The barium meal examination uses barium sulfate as the contrast agent, and according to the examination site, the powdered barium is mixed with warm boiling water to make a thin paste of different proportions, and then the full amount of barium is swallowed under the guidance of the doctor, and the shape, outline, location, size of the stomach and duodenum parts, as well as the mucosa of the gastrointestinal tract and the opening of the pylorus are observed under X-ray by fluoroscopy or camera in different body angles. The day before the examination, it is recommended to consume noodles, thin rice and other easily digestible food. 12 hours of fasting and 8 hours of water fasting are required before the examination to prevent food and water from interfering with the examination results. After the examination, you can drink water first, and after there is no discomfort, you can eat more thin rice, rice soup, noodles in clear soup, etc. At the same time, you can move moderately to increase the intestinal power and promote the discharge of barium meal in the intestine. The initial stool after the examination will be white, which is a normal phenomenon due to the discharge of barium, so there is no need to worry too much. After the examination, if there are uncomfortable symptoms such as acid reflux, nausea, vomiting and abdominal pain and diarrhea, the doctor should be informed promptly and intervention measures should be taken.