U.S. Department of Health and Human Services

Diverticulosis and Diverticulitis

​​Definition and Facts for Diverticulosis and Diverticulitis
Diverticulosis is a condition that occurs when small pouches, or sacs, form and push outward through weak spots in the wall of your colon. In diverticulitis, one or a few of the pouches in the wall of your colon become inflamed.
Symptoms and Causes of Diverticulosis and Diverticulitis
Most people with diverticulosis do not have symptoms. Symptoms may include constipation, diarrhea, abdominal pain, or bloating. Diverticulitis most often causes abdominal pain, which is usually severe. Experts are not sure what causes these conditions.
​​​​Diagnosis of Diverticulosis and Diverticulitis
Your doctor may notice pouches in your colon wall while performing tests for other reasons. If you have symptoms that suggest diverticulosis or diverticulitis, your doctor may ask about your medical history and perform a physical exam and tests.
​​​​​Treatment for Diverticulosis and Diverticulitis
Treatments for diverticulosis include fiber, medicines, and probiotics. Treatments for diverticulitis include rest, oral antibiotics, and a liquid diet. If your diverticulitis causes problems, you may need additional treatments.
​​Eating, Diet, and Nutrition for Diverticulosis and Diverticulitis
If you have diverticulosis or if you have had diverticulitis in the past, your doctor may recommend eating more foods that are high in fiber. Some of the best sources of fiber include fruit; vegetables, particularly starchy ones; and whole grains.
​​​Clinical Trials for Diverticulosis and Diverticulitis
The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) and other components of the National Institutes of Health (NIH) conduct and support research into many diseases and conditions.
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This content is provided as a service of the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the National Institutes of Health. The NIDDK translates and disseminates research findings through its clearinghouses and education programs to increase knowledge and understanding about health and disease among patients, health professionals, and the public. Content produced by the NIDDK is carefully reviewed by NIDDK scientists and other experts. 
The NIDDK would like to thank:
Lisa L. Strate, M.D., M.P.H., University of Washington School of Medicine, Harborview Medical Center
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