What is Irritable Bowel Syndrome (IBS)?

Irritable bowel syndrome (IBS) is the most common condition to affect the bowel. It is the bowel function that is abnormal as there is no structural abnormality. There have been a variety of names including spastic constipation, chronic irritable bowel syndrome, spastic colon, spastic colitis and mucous colitis. There is a spectrum of severity ranging from very minimal symptoms to distressing discomfort and pain. IBS may last a few years then disappear by itself.

When food is swallowed, it passes down to the stomach. Here it becomes a fluid that passes through to the small intestine where most of the nutrients are absorbed. The remaining waste products are collected in the colon and rectum, which is emptied during defaecation.

The intestine is a smooth muscle tube with a special inner lining facilitating nutrient absorption. The normal bowel propels its contents along by orderly, smooth-muscle contraction waves called peristalsis. When peristalsis is irregular, the patient may experience discomfort or pain, intermittent diarrhoea and constipation, bloating and flatulence (wind) and these are the typical symptoms of IBS.

How can we diagnose IBS?

Until the last few years, the diagnosis of irritable bowel syndrome was made only after full and extensive investigations showing no structural abnormality. Nowadays, full investigations are only required if there is doubt about the diagnosis from the clinical presentation. Typically, there must be more than three months of recurring or continuous abdominal pain or discomfort that is usually relieved after a bowel action (defaecation). The pain may be mild and infrequent or so severe that there is accompanying sweating or faintness. No single symptom is unique to IBS. There may be a change in Frequency of bowel action or change in stool consistency. Abdominal bloating or distension and passing mucus on the stool are also common.

All of the symptoms of IBS can occur with other bowel diseases and disorders and it is, therefore, important that the diagnosis should be made by a doctor. Examples of chronic bowel inflammatory diseases that could cause pain include Crohn's disease, ulcerative colitis and diverticulitis. Tumours of the bowel become more common as we get older so that an important consideration in deciding how far to investigate the symptoms is your age.


Evaluation of the quality of Web sites is discussed in (Q4.27). You may find that several general women's health sites may help you (internet information). The following are more specialised relevant Web sites:-

 

IBS Support Groups:


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This is the personal website of David A Viniker MD FRCOG, Consultant Obstetrician and Gynaecologist at Whipps Cross University Hospital, London - Specialist Interests - Reproductive Medicine including Infertility, PCOS, PMS, Menopause and HRT.

I do hope that you find the answers to your women's health questions in the patient information and medical advice provided.





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