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    • David M. Gryboski, M.D.
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    • Aniruddh Patel, M.D.
    • David S. Rudolph, D.O.
    • Bryan L. Woods, M.D.
    • William Norris, MD
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Diverticulosis and Diverticulitis

 

DIVERTICULOSIS AND DIVERTICULITIS

Many people have small pouches in the lining of the colon, large intestine, that bulge outward through weak spots. Each pouch is called a diverticulum. The condition of having multiple pouches is called diverticulosis.  About 10 percent of Americans older than 40 have diverticulosis.1 The condition becomes more common as people age. About half of all people older than 60 have diverticulosis.2

Diverticula are most common in the lower portion of the large intestine, called the sigmoid colon. When the pouches become inflamed, the condition is called diverticulitis. Ten to 25 percent of people with diverticulosis get diverticulitis.3 Diverticulosis and diverticulitis together are called diverticular disease.

SYMPTOMS

Diverticulosis

Most people with diverticulosis do not have any discomfort or symptoms. However, some people may experience crampy pain or discomfort in the lower abdomen, bloating, and constipation. Other conditions such as irritable bowel syndrome and stomach ulcers cause similar problems, so the symptoms do not always mean a person has diverticulosis. People with chronic symptoms should visit their doctor or health care provider.

Diverticulitis

The most common symptom of diverticulitis is abdominal pain. The most common sign on examination is tenderness in the lower left side of the abdomen. Usually, the pain is severe and comes on suddenly, but it can also be mild and become worse over several days. The intensity of the pain can fluctuate. A person may experience cramping, nausea, vomiting, fever, chills, or a change in bowel habits.

TREATMENT

Diverticulosis 

Increasing the amount of fiber in the diet may reduce symptoms of diverticulosis and prevent complications such as diverticulitis. Fiber keeps stool soft and lowers pressure inside the colon so that bowel contents can move through easily. The American Dietetic Association recommends consuming 20 to 35 grams of fiber each day. See the handout for high fiber diet.

 Avoidance of nuts, popcorn, and sunflower, pumpkin, caraway, and sesame seeds has been recommended by physicians out of fear that food particles could enter, block, or irritate the diverticula. However, no scientific data support this treatment measure. Eating a high-fiber diet is the only requirement highly emphasized across the medical literature. Eliminating specific foods is not necessary. The seeds in tomatoes, zucchini, cucumbers, strawberries, and raspberries, as well as poppy seeds, are generally considered harmless. People differ in the amounts and types of foods they can eat. Decisions about diet should be made based on what works best for each person. Keeping a food diary may help identify what foods may cause symptoms.

Treatment for Diverticulitis

Treatment for diverticulitis focuses on clearing up the inflammation and infection, resting the colon, and preventing or minimizing complications.

Depending on the severity of symptoms, the doctor may recommend bed rest, oral antibiotics, a pain reliever, and a liquid diet. If symptoms ease after a few days, the doctor will recommend gradually increasing the amount of high-fiber foods in the diet.

Severe cases of diverticulitis with acute pain and complications will likely require a hospital stay. Most cases of severe diverticulitis are treated with IV antibiotics and a few days without food or drink to help the colon rest. In some cases, surgery may be necessary.

Points to Remember

  • Diverticulosis occurs when small pouches called diverticula bulge outward through weak spots in the colon, or large intestine.
  • Most people with diverticulosis never have any discomfort or symptoms.
  • Diverticula form when pressure builds inside the colon wall, usually because of constipation.
  • The most likely cause of diverticulosis is a low-fiber diet because it increases constipation and pressure inside the colon.
  • For most people with diverticulosis, eating a high-fiber diet is the only treatment needed.
  • Fiber intake can be increased by eating whole-grain breads and cereals; fruits like apples and pears; vegetables like peas, spinach, and squash; and starchy vegetables like kidney and black beans.
  • Diverticulitis occurs when the pouches become inflamed and cause pain and tenderness in the lower left side of the abdomen.
  • Diverticulitis can lead to bleeding; infections; small tears, called perforations; or blockages in the colon. These complications always require treatment to prevent them from progressing and causing serious illness.
  • Severe cases of diverticulitis with acute pain and complications will likely require a hospital stay. When a person has complications or does not respond to medication, surgery may be necessary.

National Digestive Diseases Information Clearinghouse

2 Information Way
Bethesda, MD 20892–3570
Phone: 1–800–891–5389
TTY: 1–866–569–1162
Fax: 703–738–4929
Email: nddic@info.niddk.nih.gov
Internet: www.digestive.niddk.nih.gov

NIH Publication No. 08–1163
July 2008


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