Drinking stomach pain can be caused by ethanol irritation, but it can also be caused by digestive disorders and alcohol allergies. Specifically as follows: 1. ethanol stimulation: ethanol-containing beverages can make the gastric mucosa produce erythema and erosion damage, destroy the normal tissue structure within the mucosa and submucosa, can also damage the normal energy metabolism, thus destroying the cellular function, but also stimulate the secretion of gastric acid, aggravating mucosal damage. 2. Digestive tract diseases: such as chronic gastritis, reflux esophagitis, peptic ulcer and other diseases lead to gastrointestinal mucosal damage, so when the alcohol these irritating substances into the stomach, the stomach will appear pain and other manifestations. 3. Allergy to alcohol: Some people who are allergic to alcohol will experience facial flushing, itching all over the body, skin rashes and stomach pain. If the above symptoms appear immediately stop drinking alcohol, after resting the symptoms do not see obvious relief, it is recommended to promptly go to the hospital gastroenterology department, under the guidance of the doctor standardized treatment.