Stomach pain the day after drinking alcohol, this condition is likely to be caused by alcohol causing damage to the gastric mucosa tissue, alcohol can directly damage to the gastric mucosa, leading to have gastric mucosa congestion, erosion or even have a rupture. If the patient himself has gastric erosion, gastric ulcer or bile reflux gastritis, after drinking alcohol, the symptoms of the above diseases will be aggravated, leading to an increase in the degree of stomach pain. In cases like this, mild cases can be treated directly with omeprazole or lansoprazole plus rehabilitative new liquid. If the symptoms are not relieved after 2-3 days of medication, it is recommended to do gastroscopy as soon as possible to rule out the possibility of other aspects of stomach diseases, such as gastric cancer. In addition, when you have the above symptoms, you definitely should not drink any more alcohol, and you should mainly eat light, liquid food and pay attention to keeping your abdomen warm.