Diverticulosis is the condition of having weak areas or outpouchings in the wall of the colon.
The colon is part of the large intestine. The pouches, called diverticula, look somewhat like small thumbs poking out of the side of the intestine. Diverticulosis is a common condition. More than half of all elderly people in the United States have it. Diverticula seem to occur when the pressure inside the colon is too high.