What is diverticular disease?

Diverticular (say: die-ver-tick-yoo-ler) disease affects the large intestine (colon). It is caused by small pouches that can form anywhere, but they usually form in the wall of the last part of the large intestine, the sigmoid colon. These pouches are called diverticula.  Most people with diverticula never have symptoms.

The most common types of diverticular disease are:

Diverticulosis.People with diverticulosis have pouches in the large intestine. Most people with diverticulosis don't have any problems and may not even know they have it.
  

Diverticulitis. This occurs when the pouches become infected and inflamed. Symptoms of diverticulitis can include abdominal pain, constipation, vomiting and fever. Pain is most often located on the lower left side of the abdomen. The symptoms of diverticulitis depend on how bad the infection is. Complications of diverticulitis can include intestinal blockages and openings in the bowel wall.
  

Diverticular bleeding.Diverticular bleeding occurs when a blood vessel next to the pouches bursts. You may find blood in a bowel movement or in the toilet. If you notice blood coming from your rectum, you should call your doctor immediately.