Many people who have diverticulosis do not have any symptoms. If they do have symptoms, abdominal pain is the most common one. The pain is usually in the lower left abdomen. You may feel the pain most of the time, or it may come and go. You may also have more bowel gas or constipation.
Diverticulosis can also cause a lot of painless bleeding from the rectum.
Bleeding is less common than other symptoms. Sometimes the pouches in the colon can become infected. 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.