Definition of Irritable bowel syndrome:

Irritable bowel syndrome (IBS) refers to a complex disorder of the lower intestinal tract. It is mainly characterized by a pattern of symptoms that is often worsened by emotional stress.

It is not the same as inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis.

Causes, incidence, and risk factors:

Irritable bowel syndrome involves a combination of abdominal pain and alternating constipation and diarrhea. There are many possible causes. For instance, there may be a problem with muscle movement in the intestine or a lower tolerance for stretching and movement of the intestine. There is no problem in the structure of the intestine.

Irritable bowel syndrome (IBS) can occur at any age, but often begins in adolescence or early adulthood. It is more common in women. Risk factors may include a low-fiber diet, emotional stress, use of laxatives, having had infectious diarrhea, or other temporary bowel inflammation.

Irritable bowel syndrome is extremely common, but only a small number of people seek treatment.