IBD is not irritable bowel syndrome (IBS)
Despite some overlapping symptoms, IBD and IBS are two different conditions. IBS is often episodic, meaning the symptoms wax and wane, but it is a not associated with any identifiable disease of the GI tract. IBD, on the other hand, is marked by inflammation of some part of the GI tract, and is a more serious condition. In either case, diet can play a role in alleviating symptoms.
Source: http://www.ccfa.org/assets/pdfs/flares_brochure_final.pdf. Accessed December 2014.