UC is characterized by a long - lasting cycle of remission and exacerbations of ulceration of bowels, abdominal pain, diarrhea, bloody stool, and other systemic symptoms. (sciencedaily.com)
This diseases causes ulceration in the colon's lining. (cuteness.com)
It specifically causes ulcerations of the small and large intestines, but can affect the digestive system anywhere from the mouth to the anus... More (termland.com)