The cause of IBS is not known. Doctors call it a functional disorder because there is no sign of diseases such as inflammation or infection when the colon is examined.
Irritable Bowel Syndrome
IBS is one of the most common disorders of the digestive system producing a spectrum of symptoms such as persistent and recurring abdominal pain associated with the passing of motion,
Since there is no diagnostic marker associated with IBS, the diagnosis is based on symptoms and by excluding other diseases, which may have similar symptoms such as ulcerative colitis,