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Irritable Bowel Syndrome

The diagnosis of irritable bowel syndrome (IBS) is often based on a pattern of symptoms over several years - similar to the diagnosis of migraine headaches.

Symptoms usually start in the 20's or 30's but can begin at any age. Symptoms can vary from mild to moderate - often related to stressful life events.

Key Points:

  1. Irritable bowel symptoms are very common (up to 15-20% of the population across all ages).
  2. Irritable bowel syndrome is more common in women than in men and a family history is common.
  3. Irritable bowel syndrome tends to persist over a lifetime, but can come and go.
  4. Irritable bowel syndrome is caused by a combination of abnormal muscular activity of the small intenstine and colon and abnormal sensitivity.
  5. It is not caused by food allergy or an infection, but food intolerance can be important.
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