Irritable bowel syndrome (IBS) is a functional bowel disorder in which abdominal pain or discomfort is associated with defecation or a change in bowel habit.

IBS is a complex motor and sensory disorder. It is very common and can overlap with other conditions. A confident diagnosis can be made based primarily on well-defined symptoms. Effective diagnosis and treatment starts with the recognition of the validity of symptom complaints. Multiple combinations of factors contribute to the symptoms and treatments will vary. Setting realistic treatment goals that fit individual needs is an important step. A strong partnership between a knowledgeable patient and an empathetic, knowledgeable healthcare provider can produce significant improvement and control over symptoms for most individuals with IBS.

The cause of IBS is not completely understood. Many factors may contribute to symptoms, which vary from person to person. The changes in normal function appear due, in part, to disturbances affecting the normal movement (motility) of muscles in the intestines. The muscle contractions can be influenced by several factors, such as stretching or distention, hormones, and stress. Alterations in the sensitivity of the nerves in the gut, and a dysregulation in the way the brain controls these functions, are other factors contributing to the pain and other symptoms of IBS.

For the latest information about IBS, visit the International Foundation for Functional Gastrointestinal Disorders (IFFGD) website.

Learn more about common overlapping conditions. Also contact other not-for-profit health organizations for more information about these related conditions.

Posted December 4, 2008