If you have fever as well as abdominal pain, you may have developed an infection called diverticulitis. The outpouchings of diverticulosis are best seen with a test called a barium enema x-ray. Barium is put into the rectum and colon. The barium then shows the outline of the intestines on the x-ray. This allows the diverticula in the outside walls of the large intestine to be seen.
Flexible sigmoidoscopy is another procedure that can find diverticula.
The doctor inserts a scope, which is a flexible tube and light, into your rectum. The doctor can then look inside your large intestine. Most importantly, you need to have more fiber in your diet. Also eat more fruits and vegetables. In addition, high-fiber dietary supplements may be helpful.