The term ‘inflammatory bowel disease' (IBD) refers to one of two chronic gut disorders. Crohn's disease usually affects the small intestine, but may involve the large intestine as well. Ulcerative colitis (UC) is seen only in the large intestine. As small-intestine function differs from that of the large intestine, there are important differences between the two conditions. (IBS, or irritable bowel syndrome, is often confused with IBD, but is a distinctly separate, non-inflammatory condition.)
Colitis often appears due to excess liver activity.
Crohn's appears with a deficiency of liver activity, allowing stomach acid production to be excessive.
Both conditions respond extremely when combined with appropriate dietary measures like identifying and removing sensitive foods and those foods which play havoc with the aforementioned organs eg coffee, chocolate, cheese, alcohol, hot spicy foods, for a period.