Gas in the stomach is a usual sign that a person is swallowing air while eating or drinking.
Burping generally helps to release the gas and alleviate any bloating and discomfort.
Gas in the digestive tract (that is, the esophagus, stomach, small intestine, and large intestine) comes from two sources: swallowed air, and the normal breakdown of certain undigested foods by harmless bacteria naturally present in the large intestine (colon).
Gas in the stomach happens due to:
Smoke (people who smoke have a tendency to inhale lots greater air than non-people who smoke).
Some foods consist too much carbs and sugar, starch (except rice), and fibers.
Beer, soda, and other carbonated beverages.
Eating habits such as drinking through straws, chewing gums, eating too fast, sucking on candies, or chewing and talking result in additional air being swallowed.
Fiber supplements rich in psyllium, such as Metamucil, can raise the amount of colonic gas.
Sugar substitutes or artificial sweeteners like xylitol, sorbitol, and mannitol in sugar-free foods and beverages can cause excessive colonic gas.