Diarrhea after drinking alcohol may be caused by alcohol stimulation, flora imbalance, acute gastroenteritis and other factors. 1. Alcohol stimulation: when patients drink a lot of alcohol, alcohol will cause stimulation of the gastrointestinal mucosa, leading to gastrointestinal peristalsis dysfunction, which can easily cause abdominal pain, diarrhea and other symptoms. 2. Bacterial dysbiosis: after patients drink a lot of alcohol, the alcohol reaches the intestinal tract, which is easy to make the intestinal flora dysbiosis, leading to changes in the intestinal microenvironment of the patient, so that the patient has the symptoms of post-drinking diarrhea. 3. Acute gastroenteritis: diarrhea after drinking alcohol is because alcohol will stimulate the mucous membrane of the gastrointestinal tract, causing gastrointestinal tract dysfunction, leading to gastrointestinal mucous membrane congestion and edema and acute gastroenteritis. Diarrhea after drinking alcohol may also be caused by other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor for targeted treatment. Please do not take medication on your own to avoid delaying your condition.