Vomiting after drinking water may be related to the intake of too much alcohol, gastritis, gastric ulcers and so on. The degree of vomiting after drinking varies. Some human bodies contain ethanol dehydrogenase and acetaldehyde dehydrogenase, which can break down ethanol into water and carbon dioxide, and those who are rich in these two enzymes will quickly break down alcohol after drinking large amounts of alcohol. But for the lack of ethanol dehydrogenase, acetaldehyde dehydrogenase of the crowd, after drinking a lot of alcohol, ethanol will stimulate the gastric mucosa, so that the gastric wall of the nerve spasm, secretion of large amounts of gastric acid, gastric acid will also be refluxed with the gastric contents of the esophagus, resulting in pancreatic, esophageal mucous membrane damage, which will lead to heartburn, food regurgitation, vomiting and other symptoms. In addition, drinking water after drinking all vomit may also be related to gastritis and gastric ulcer and other diseases, if necessary, should be carried out gastroscopy. There are many other reasons that cause patients to vomit after drinking water, if the symptoms are serious or continue to see no improvement, it is recommended to go to the regular hospital in a timely manner, after clarifying the cause of the disease, under the guidance of the doctor to carry out targeted treatment.