Vomiting bitter water the day after drinking is related to bile reflux, gastritis, poor gastric power and other factors. Frequent drinking is more harmful to the body and can also lead to a decrease in the body’s immunity. If the intake of alcohol is high, the next day of drinking is also prone to dry mouth and bitterness, and at this time, spitting up is mainly considered to be caused by bile reflux into the stomach. Drinking a lot of alcohol will cause stimulation to the gastric mucosa, leading to gastric and duodenal dysfunction, and gastric juice will reflux into the stomach along the body’s duodenum, and the patient will easily show the performance of spitting up. Alcohol can cause irritation to the mucous membrane of the gastrointestinal tract, resulting in chronic gastritis, gastric ulcer and other diseases, which can easily lead to increased stomach acid. Stomach acid will cause irritation to the stomach wall and strong contraction of the stomach causes vomiting, and part of the bile appears with the vomiting piece, so the patient will have this performance. Some patients have poor gastric power, resulting in the gastric acid and duodenal fluid in the stomach cavity cannot be emptied normally, and due to the relatively large amount, the pressure in the abdomen increases and it will reflux into the esophagus, and they are also prone to acid vomiting from the mouth.