The upset stomach after drinking alcohol may be caused by alcohol irritating the gastric mucosa and stimulating the secretion of gastric acid. It can be relieved by drinking warm water, adjusting the diet and so on, and if necessary, through the compound bismuth aluminate granules and other drugs to relieve. 1. Drink warm water: Warm water can dilute the alcohol in the stomach, and also can diuretic to promote the alcohol out of the body. It can relieve the symptoms of stomach discomfort. 2. Adjust diet and living habits: avoid spicy and greasy food, avoid overeating, reduce the demand for alcohol and tobacco, and eat more protein-rich food. 3. Take medication: under the guidance of a doctor, you can take bismuth aluminate granules and other antacid medication to relieve stomach discomfort. Compound bismuth aluminate granules adverse reactions are constipation, insomnia, diarrhea, etc.; allergic to this product, renal insufficiency is prohibited. If there is obvious stomach discomfort, unrelieved pain or acute upper gastrointestinal bleeding due to alcohol consumption, you should go to the regular hospital for treatment.