Belching is often caused by aerophagia, a medical term for swallowing air. Everyone carries a certain amount of air and other gases in the gastrointestinal tract all the time. On average, this tends to be slightly less than 1 cupful. Yet the body is constantly acquiring air and other gases throughout the day, taking some in through the mouth and producing some on its own. In all, it works out to almost 10 cupfuls of gas in 24 hours, about 9 cupfuls more than we can carry. The body constantly seeks ways to vent this excess. One of those ways is belching.
Soft drinks and beer are guaranteed to cause problems, but your saliva also contains tiny air bubbles that travel to the stomach with every swallow.
Those of us who swallow air along with our food are asking for trouble, but belching is a problem that seems infinitely curable right at home. Most of us can, with practice, control the amount of air we swallow and save the doctor for something more important.
Become aware of air. "You can swallow up to 5 ounces of air every time you swallow," says André Dubois, M.D., a gastroenterologist in Bethesda, Maryland. "And people who are nervous will do this quite frequently."
Dr. Dubois notes that some people are compulsive swallowers and create a problem simply by swallowing too much saliva. "You can improve this by learning to control your swallowing reflexes," he says. "This is best done by simply becoming aware of it. Ask your friends or relatives to tell you if they notice you swallowing a lot. You probably won't notice it in yourself."
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Once you're aware of an excessive swallowing habit, you will automatically curb it, says Dr. Dubois. There are also some personal habits you can change to help you take in less air.
Nix a nervous belching habit. It's been noted that chronic air swallowers can belch forever, since belching tends to beget more belching. Yet even chronic nervous swallowers can be helped.
Marvin Schuster, M.D., chief of the Department of Digestive Diseases at Francis Scott Key Medical Center in Baltimore, Maryland, sometimes prescribes a pencil for those who swallow air and start bloating up during tense situations.
"Clamping your teeth around a pencil, or a cork or your finger, keeps your mouth open and makes swallowing difficult," he says.
Say good-bye to gassy goodies. We will all eat a little too much a little too quickly and burp, says Samuel Klein, M.D., assistant professor of gastroenterology and human nutrition at the University of Texas Medical School at Galveston. But that's different than people who belch hour after hour, day after day. That's chronic belching.
For those people, it may be useful to decrease their intake of foods that produce upper digestive system gas. Generally speaking, those include fats and oils such as salad oil, margarine, and sour cream.
Smash bubbles with soothing simethicone. To help alleviate a problem that already exists, digestive experts sometimes recommend over-the-counter antacids containing simethicone, such as Mylanta, Mylanta II, Maalox Plus, or Di-Gel.
"Simethicone will break large bubbles into small bubbles in the stomach, which may decrease belching," says Dr. Klein. "It does not reduce the amount of gas present."
André Dubois, M.D., is a gastroenterologist in Bethesda, Maryland.
Samuel Klein, M.D., is assistant professor of gastroenterology and human nutrition at the University of Texas Medical School at Galveston. He is also an editorial adviser to Prevention magazine.
Richard McCallum, M.D., is a professor of medicine and chief of the Gastroenterology Division at the University of Virginia Health Sciences Center in Charlottesville. He does research on gastrointestinal problems.
Marvin Schuster, M.D., is chief of the Department of Digestive Diseases at Francis Scott Key Medical Center in Baltimore, Maryland, and a professor of medicine and psychiatry at Johns Hopkins University School of Medicine in Baltimore.