Barium X-ray, also known as X-ray gastrointestinal imaging, is an examination method that utilizes medical barium sulfate as a contrast agent to observe the general morphology of the upper gastrointestinal tract and the location of lesions under X-ray irradiation. Barium enema is a mixture of barium sulfate that is injected into the colon through a catheter and through the anus, and then visualized under fluoroscopy to observe the presence of colorectal lesions. Barium X-ray is one of the most common tests for digestive disorders and can detect gastrointestinal disorders such as gastric ulcers, esophageal varices and duodenal lesions. You should abstain from food and water for 6 to 12 hours prior to the barium X-ray examination and from taking medications that affect gastrointestinal function and are impervious to X-rays for 3 days prior to the examination. Barium enema is a method of radiological examination of the colon, which is mainly used to find out whether there are colorectal tumors, colorectal stenosis, inflammatory bowel disease and other diseases. One week before the barium enema test, do not take medications containing heavy metals, and do not eat breakfast on the day of the imaging. It should be noted that X-ray barium meal and barium enema examination is contraindicated in cases of gastrointestinal perforation, bleeding, and acute gastrointestinal inflammation. It is recommended that patients strictly follow the doctor’s instructions when doing X-ray barium meal and barium enema examination, and if there are special circumstances, explain to the doctor in time to avoid affecting the examination results.