Drinking and vomiting yellow water means that the patient’s vomit contains part of yellow bile, thus manifesting as yellow water vomiting, and the reasons for this mainly include the following 2 aspects: 1, because after the patient drinks, alcohol as a chemical stimulant can cause muscle relaxation and movement disorder in the pylorus part of the stomach, so it can lead to bile reflux from the duodenum to the stomach; 2, because alcohol as a direct chemical stimulant, it can stimulate the vomiting center of the central nervous system of the human brain, while alcohol is a strong stimulant, which can cause inflammation in the stomach, esophagus and even duodenum, and the corresponding part of inflammation can be used as a peripheral stimulus and transmitted to the vomiting center through the nerves. Therefore, alcohol stimulation and inflammatory stimulation of the digestive tract acting simultaneously on the vomiting center can cause the patient to vomit, and then vomit the stomach contents containing yellow bile out of the stomach, resulting in the patient’s performance of vomiting yellow water.