Gas is air in the intestine that is passed through the rectum. Air that moves from the digestive tract through the mouth is called belching.
Gas is also called flatus or flatulence.
Gas is normally formed in the intestines as your body digests food.
Gas can make you feel bloated. It can cause crampy or colicky pains in your belly.
Gas can be caused by certain foods you eat. You may have gas if you:
Other common causes of gas are:
The following tips may help you prevent gas:
Call your doctor or nurse if you have:
Your doctor or nurse will perform a physical exam and ask questions about your medical history and symptoms, such as:
Tests that may be done include:
PR Gibson, SJ Shepherd. Evidence-based dietary management of functional gastrointestinal symptoms: The FODMAP approach. J Gastroenterol Hepatol. 2010 Feb;25(2):252-8.
Bailey J. FPIN's Clinical Inquiries: Effective management of flatulence. Am Fam Physician. 2009;79:1098-1100.
Ohge H, Levitt MD. Intestinal gas. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, PA: Saunders Elsevier; 2010:chap 16.
Updated by: Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Aria Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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