Fatty foods, fruits and vegetables, carbohydrates and carbonated beverages may cause bloating and gas, according to Mayo Clinic. Examples of foods that may cause bloating and gas include whole-grain foods, beans, broccoli and lettuce. Brussels sprouts, onions, cauliflower, and milk and milk products may also cause bloating and gas. Some people may experience bloating and gas after eating sugar alcohols such as mannitol, xylitol or sorbitol, which are found in sugar-free foods and drinks.
Other foods that may cause gas or bloating include chewing gum, hard candy, cabbage, and fruits such as pears, peaches and apples, notes Mayo Clinic. Gas and bloating may also be caused by eating too quickly, drinking through a straw, stress or anxiety. Smoking may also cause gas and bloating. Some people may experience gas and bloating due to a gastrointestinal disease, infection or blockage.
Some conditions such as lactose intolerance or celiac disease may prevent the intestines from absorbing and digesting certain foods properly, which may result in gas and bloating, states Mayo Clinic. Belching may be reduced by eating slower, swallowing less air and treating heartburn. Mild heartburn can be treated with over-the-counter antacids, and gastroesophageal reflux disease may require prescription medications. Ill-fitting dentures may also cause air to be swallowed when eating or drinking.