Gastrointestinal barium meal examination usually includes fasting, oral intake of barium and X-ray observation, and barium meal examination should be performed under the guidance of professional doctors. Barium meal examination mainly uses oral intake of contrast medium to observe the whole digestive tract through X-ray. During the barium meal examination, the patient should be told to keep an empty stomach, and then take barium orally before the examination, so as to observe whether there are ulcers, stenosis or tumorous lesions in the digestive tract, as well as duodenal stagnation and other diseases in the process of the examination. Unlike gastroscopy, barium meal is an imaging test, and if any abnormality is found during the examination, further gastroscopy may be required.