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Irritable bowel syndrome (IBS) has long been recognized as an important and challenging disorder for the gastroenterologist in western Europe and North America. Recent studies from Asia and other regions have raised the possibility that IBS may be prevalent elsewhere. For this reason, WGO chose IBS as its focus for World Digestive Health Day (WDHD) 2009 – a choice that proved most propitious, as the topic generated a great deal of interest in the lay press and media, as well as among gastroenterologists and health-care professionals in general. WDHD became WDH Year, such was the interest generated by IBS!
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Gas in the gastrointestinal tract is normal. Passage of gas by belching or as flatus (gas per rectum) is normal. Gas in the digestive tract comes from two main sources - swallowed air and through the breakdown of certain undigested foods. Gas is produced by the breakdown of these foods by bacteria normally present in the large intestine. Swallowed air is a common cause of gas in the stomach. A small amount of air is swallowed with eating and drinking, particularly when eating or drinking quickly. Loose dentures, chewing gum and smoking also increase the amount of air swallowed.
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Functional gastrointestinal disease accounts for the majority of patient presentations at gastrointestinal clinics, and up to 50% or more of patients presenting with abdominal symptoms have no organic abnormality detected. The most common functional gastrointestinal conditions in Canada are irritable bowel syndrome (IBS), and functional dyspepsia or nonulcer dyspepsia (NUD).
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Important: This information should not be used as a substitute for the medical care and advice of your physician. 
