How can doctors detect bleeding caused by diverticulitis?

Stool exam. Blood in or on the stool, can be detected by simple test. Passing blood is serious.
Colonoscopy, Angio.. Diverticuli are small out pouches of the wall of the colon which are very prevalent in the us, occurring in as many as 1/3 people by age 60. Most people have no symptoms yet these diverticuli can rupture, leading to diverticulitis. They can also lead to bleeding, which is most easily detected by colonoscopy, a nuclear medicine "bleeding scan", or an angiogram.