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.
Sometimes stomach gas causes nausea and poor appetite. Gas in the stomach may remain for a time before releasing. Too much stomach gas may cause an upset stomach. Stomach gas may remain in the stomach longer in patients who have an irritable bowel syndrome, ulcer or other digestive condition.