Irritable Bowel Syndrome (IBS), which is classified as a functional gastrointestinal disorder, is a chronic condition of the lower gastrointestinal tract. Not easily characterized by structural abnormalities, infection, or metabolic disturbances, the underlying mechanisms of IBS have for many years remained unclear. Recent research, however, has lead to an increased understanding of IBS. As a result, IBS is now considered an organic and, most likely, neurologic bowel disorder. The symptoms of

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... e condition do not leave any visible signs of damage or disease on the digestive tract, making IBS hard to study microscopically. In this article we have tried to give an overlook over the causes of IBS.