Diarrhea after drinking is usually a very common gastrointestinal disorder, the common causes are the following: 1, the stimulating effect of alcohol. Alcohol is a stimulating drink, after drinking alcohol will stimulate the mucous membrane of the gastrointestinal tract, leading to gastrointestinal discomfort, so that the gastrointestinal tract peristalsis enhanced, diarrhea occurs. 2, cold drinks to drink too much. The cold will stimulate the gastrointestinal system, causing it to spasm and speed up gastrointestinal peristalsis, leading to diarrhea.3. Patients themselves have gastrointestinal diseases, and drinking alcohol increases the burden on the gastrointestinal tract, aggravating the original gastroenteritis, colitis and other diseases, leading to diarrhea.4. The interaction between alcohol and food is related. While drinking alcohol, excessive consumption of spicy, greasy, cold and irritating food will also stimulate the gastrointestinal tract and make its peristalsis stronger, which will also lead to diarrhea.