<unk>  (Colitis ulcerosa,<unk>  is a form of inflammatory bowel disease (IBD).<unk>  is a form of colitis, a disease of the intestine, specifically the large intestine or colon, that includes characteristic ulcers, or open sores, in the colon. The main symptom of active disease is usually diarrhea mixed with blood, of gradual onset.<unk>  is, however, a systemic disease that affects many parts of the body outside the intestine. Because of the name, IBD is often confused with irritable bowel syndrome ("IBS"), a troublesome, but much less serious condition.<unk>  has similarities to Crohn's disease, another form of IBD.<unk>  is an intermittent disease, with periods of exacerbated symptoms, and periods that are relatively symptom-free.  Although the symptoms of<unk>  can sometimes diminish on their own, the disease usually requires treatment to go into remission.
Ulcerative colitis
Drug-induced colitis
Allergic colitis
Pseudomembranous colitis
Microscopic colitis
Chemical colitis
Ischemic colitis
Crohn's disease