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Irritable bowel syndrome (IBS) is a problem that affects the large intestine. It can cause abdominal cramping, bloating, and a change in bowel habits. Some people with the disorder have constipation. Some have diarrhea. Others go back and forth between the two. Although IBS can cause a great deal of discomfort, it does not harm the intestines.

IBS is common. It affects about twice as many women as men and is most often found in people younger than 45 years. No one knows the exact cause of IBS. There is no specific test for it. Your doctor may run tests to be sure you don't have other diseases. These tests may include stool sampling tests, blood tests, and x-rays. Your doctor may also do a test called a sigmoidoscopy or colonoscopy. Most people diagnosed with IBS can control their symptoms with diet, stress management, probiotics, and medicine.

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  1. Irritable Bowel Syndrome (National Library of Medicine)  
    Irritable bowel syndrome (IBS) is a problem that affects the large intestine. It can cause abdominal cramping, bloating, and a change in bowel ... go back and forth between the two. Although IBS can cause a great deal of discomfort, it ...
  2. Irritable Bowel Syndrome Interactive Tutorial (Patient Education Institute)  
    Irritable Bowel Syndrome Introduction Irritable bowel syndrome, or IBS, is a very common intestinal disorder. About 15% of all American adults have symptoms of IBS. Irritable bowel ...
  3. Post-Infectious IBS (IBS-PI) (International Foundation for Functional Gastrointestinal Disorders) - PDF  
    ... Are Contact Us Donate What is post-infectious IBS (PI-IBS)? What is IBS? Intro to IBS What are the symptoms of ... infected people or animals. How common is PI-IBS? Between 6–17% of individuals with IBS who ...
  4. Irritable Bowel Syndrome (IBS), Heartburn, Dyspepsia: What's the Difference? (International Foundation for Functional Gastrointestinal Disorders) - PDF  
    ... Buy IFFGD Merchandise Take Action Contact Us Donate Irritable Bowel Syndrome (IBS), Heartburn, Dyspepsia: What’s the Difference? The anatomical diseases ...
  5. Irritable Bowel Syndrome From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... Version PDF Version (413 KB) Alternate Language URL Irritable Bowel Syndrome Page Content DUE TO UNFORESEEN CIRCUMSTANCES, PUBLICATION ORDERS ... through Research For More Information Acknowledgments What is irritable bowel syndrome (IBS)? Irritable bowel syndrome is a functional gastrointestinal ( ...
  6. What I Need to Know about Irritable Bowel Syndrome Easy-to-Read From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... Language URL What I need to know about Irritable Bowel Syndrome Page Content DUE TO UNFORESEEN CIRCUMSTANCES, PUBLICATION ORDERS ... Pronunciation Guide For More Information Acknowledgments What is irritable bowel syndrome (IBS)? Irritable bowel syndrome * (IBS) is a functional ...
  7. Irritable Bowel Syndrome in Children From the National Institutes of Health (National Institute of Diabetes and Digestive and Kidney Diseases)  
    ... know about Irritable Bowel Syndrome Alternate Language URL Irritable Bowel Syndrome in Children Page Content DUE TO UNFORESEEN CIRCUMSTANCES, ... through Research For More Information Acknowledgments What is irritable bowel syndrome (IBS)? Irritable bowel syndrome is a functional gastrointestinal ( ...
  8. Irritable Bowel Syndrome (Nemours Foundation)  
    ... intestinal disorder called irritable bowel syndrome. What Is Irritable Bowel Syndrome? Irritable bowel syndrome (IBS) is a somewhat baffling ... the intestines. Continue What Are the Symptoms of IBS? The symptoms of IBS are usually recurring (meaning ...
  9. IBS Treatment Options (International Foundation for Functional Gastrointestinal Disorders)  
    ... Mobile App Who We Are Contact Us Donate IBS Treatment Options A short bout of abdominal pain ... irritable bowel syndrome (IBS) – and are generally treatable. IBS Treatments Depend on Symptom Severity Mild symptoms occur ...
  10. Pregnancy and Irritable Bowel Syndrome (International Foundation for Functional Gastrointestinal Disorders)  
    ... Who We Are Contact Us Donate Pregnancy and Irritable Bowel Syndrome Jump to Topic Living with IBS Relationships and ... strategies for pregnant women with IBS. Fertility and IBS First it is important to point out that ...
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