Burping after eating and sleeping on your stomach is caused by stomach stimulation of the diaphragm. After eating, the stomach will be in a full state and the stomach will be overexpanded due to food intake. After eating, it is best to avoid sleeping on your stomach because your body will be in a forward leaning position and this position will lead to a slight dilatation of the esophagus. Therefore gas is more likely to enter the stomach through the esophagus, resulting in too much gas in the stomach to cause irritation to the stomach wall, burping phenomenon. The overly dilated stomach body can also stimulate the diaphragm when sleeping on your stomach, which can also lead to hiccups when the diaphragm contracts in spasm. It is best to do aerobic exercise after eating to promote stomach peristalsis to help digest food and avoid indigestion. And it is best to sleep on your side or supine to avoid stimulation of the diaphragm by the stomach body.