Eating something like bread before drinking alcohol will line your stomach, also drinking water between each alcoholic drink will make it less likely that you are sick or get a hangover. Mixing milk and alcohol is more likely to make you sick as the milk will curdle.
Belching, also known as burping, is the act of expelling gas from the stomach out through the mouth. The usual cause of belching is a distended (inflated) stomach caused by swallowed air. The distention of the stomach causes abdominal discomfort, and the belching expels the air and relieves the discomfort.
Gastroenteritis (stomach flu) is a viral condition that causes diarrhea and vomiting. Iron poisoning causes abdominal pain, vomiting, diarrhea, lethargy, and dehydration. Colon cancer is often asymptomatic, but it can cause constipation, bowel obstruction, bloody stool and more. Peptic ulcers, sores in the lining of the stomach or upper intestine, cause abdominal pain, gas, and more.