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.

Foods that cause too much gas

Foods that cause gas in one person might not cause it in another. Common foods and substances that produce gas include:

1. Beans and lentils
2. Vegetables such as cabbage, broccoli, cauliflower, bok choy and Brussels sprouts
3. Bran
4. Dairy products containing lactose
5. Fructose, which is found in some fruits and used as a sweetener in soft drinks and other products
6. Sorbitol, a sugar substitute found in some sugar-free candies, gums and artificial sweeteners
7. Carbonated beverages, such as soda or beer

Digestive disorders that cause too much gas

Too much intestinal gas means burping or flatulence more than 20 times a day. Sometimes it indicates a disorder such as:

1. Celiac disease
2. Colon cancer — cancer that starts in the part of the large intestine called the colon.
3. Constipation
4. Eating disorders
5. Functional dyspepsia (which is recurring symptoms of an upset stomach)
6. Gastroesophageal reflux disease (GERD)
7. Gastroparesis (a condition in which the stomach empties more slowly than normal)
8. Intestinal obstruction
9. Irritable bowel syndrome
10. Lactose intolerance
11. Ovarian cancer — cancer that starts in the ovaries.
12. Pancreatic insufficiency