Intestinal gas is a buildup of air in the digestive tract. It is usually not noticed until you burp or pass it rectally, called flatulence. The entire digestive tract, from the stomach to the rectum, contains intestinal gas. It is the natural result of swallowing and digestion.

In fact, certain foods, such as beans, are not fully broken down until they reach the colon in the large intestine. In the colon, bacteria act on these foods, which causes the gas.

Everyone passes gas several times daily. Occasional burping or flatulence is normal. However, too much intestinal gas sometimes indicates a digestive disorder.

Too much upper intestinal gas can come from swallowing more than a usual amount of air. It also can come from overeating, smoking, chewing gum or having loose-fitting dentures. Too much lower intestinal gas can be caused by eating too much of certain foods or not being able to fully digest certain foods. It also can be from a change in the bacteria found in the colon.

By itself, intestinal gas rarely means there is a serious condition. It can cause discomfort and embarrassment, but it's usually just a sign of a properly functioning digestive system. If you're bothered by intestinal gas, try changing your diet.

However, see your health care provider if your gas is severe or doesn't go away. Also see your provider if you have vomiting, diarrhea, constipation, unintentional weight loss, blood in the stool or heartburn with your gas.

July 11, 2023

Original article: https://www.mayoclinic.org/symptoms/intestinal-gas/basics/causes/sym-20050922