Everyone gets gas. Some people naturally have more gas, or flatus, than others. Gas is usually expelled by belching, which is passing the gas through the mouth, or by flatulence, which gets rid of the gas through the anus. The flatus that is not passed can build up in the stomach and intestine, resulting in abdominal cramping and bloating. This condition can be painful and embarrassing.
Food
Certain foods can cause increased intestinal gas, including milk, beans and cabbage. Carbonated beverages are also responsible for excess flatus. MayoClinic.com adds Brussels sprouts, broccoli and some fruits to the list.
Swallowing Air
Air can be swallowed while eating, drinking, smoking, chewing gum or wearing loose-fitting dentures. This is known as aerophagia, according to the International Foundation for Functional Gastrointestinal Disorders.
Medicine
Antibiotics can cause gas. The American College of Gastroenterology notes there are prescription medications that cause flatus, especially those that inhibit digestive enzymes.
Medical Conditions
Certain medical conditions can cause excess intestinal gas, like irritable bowel syndrome and pregnancy. Celiac disease and lactose intolerance are conditions that prevent the gut from absorbing components of food that are known to cause gas.
