The causes of abdominal pain after drinking include the following: 1. After alcohol enters the body, the mucous membrane of the gastrointestinal tract is directly stimulated by the effect of ethanol, resulting in spasmodic pain in the abdomen, which is one of the most direct and main causes. 2. After alcohol enters the body, absorption leads to intestinal congestion, and accelerated blood circulation may cause spasmodic peristalsis of the abdominal gastrointestinal tract to strengthen, which is also a cause of abdominal pain. 3, may be caused by alcohol after the alcohol pancreatitis, pain is more intense, accompanied by shoulder and back pain, accompanied by nausea, vomiting, etc.. The pain in the abdomen caused by alcohol should be given great attention, and when the pain is severe, you should actively go to the hospital to find the cause.