I am 74 and have recently had my first colonoscopy and fortunately have no sign of cancer. But they did tell me I have diverticulosis and mentioned I need to avoid foods with seeds and nuts. Are there other dietary precautions I should know about?

First, you were smart to have a screening colonoscopy. While doctors still cannot decide on the best way to screen for colorectal cancer, it is clearly documented that everyone needs some type of screening. For most people screening should begin at age 50. Talk to your doctor about what type of screening is best for you.

The disorder you ask about, diverticulosis, is common in adults older than 50. Most of the time the disorder is caused by a low-fiber diet that leads to constipation. Because people who are constipated have to strain to have bowel movements, increased pressure in the colon leads to outpouchings called “diverticuli.” The condition of having diverticuli is called diverticulosis.

Most people who have diverticulosis have no symptoms, with the exception of ongoing constipation. However, there can be a complication called diverticulitis. This local infection occurs if the outpouchings become filled with undigested food, then become infected and inflamed. Nuts and seeds are the most likely type of foodstuffs to create this problem.

To maintain good bowel health and prevent diverticulitis, talk to your physician about these recommendations:

Eat more fiber.

Drink more fluids.

Exercise regularly.

Don’t ignore the urge to have a bowel movement.

Avoid straining during a bowel movement.

Don’t use laxatives unless your physician advises them. Overuse can cause constipation.