Irritable bowel syndrome includes a group of gastrointestinal symptoms for which a cause is not known. The symptoms are often worsened by emotional stress .

Alternative Names

Pylorospasm; Nervous indigestion; Spastic colon; Intestinal neurosis; Functional colitis; Irritable colon; Mucous colitis; Laxative colitis; Functional dyspepsia

Causes, incidence, and risk factors

Irritable bowel syndrome is characterized by a combination of abdominal pain and altered bowel function. There are many possible causes. For instance, there may be a disturbance in the muscle movement of the intestine or a lower tolerance for stretching and movement of the intestine. There is no abnormality in the structure of the intestine. The condition occurs more frequently in women and usually begins between the ages of 20 and 30. Predisposing factors may be a low-fiber diet, emotional stress, and use of laxatives. Irritable bowel syndrome is extremely common, but only a small proportion of people seek treatment.

Signs and tests

Tests usually reveal no abnormalities.

Not all patients require

endoscopy , especially if symptoms begin early in life and have been stable. Patients who have irritable bowel symptoms beginning later in life usually require endoscopy.

Patients over age 50 should be screened for colon cancer.

Younger patients with persistent diarrhea may require endoscopy to rule out

inflammatory bowel disease , which is an autoimmune disorder and is not the same as irritable bowel syndrome.

Treatment

The objective of treatment is to relieve symptoms. Changes in diet may help alleviate symptoms in some patients. No diet is applicable to all patients. Increasing dietary fiber and eliminating gastrointestinal stimulants such as caffeine may be beneficial. Other possible treatment may include:

Anxiety

-reducing measures, such as regular

exercise .

Anticholinergic medications before meals.

Counseling in cases of severe anxiety or

depression . A medication called Tegaserod is available for patients with constipation-predominant irritable bowel syndrome. Your doctor can decide if this medication is appropriate for you.

Expectations (prognosis)

Irritable bowel syndrome may be a life-long chronic condition, but symptoms can often be improved or relieved through treatment.

Complications

Discomfort

Dehydration

Malnutrition

resulting from food avoidance

Depression

Calling your health care provider

Call your health care provider if you have symptoms of irritable bowel syndrome or if you notice a persistent change in your bowel habits.