irritable bowel syndrome

irritable bowel syndrome (IBS), condition characterized by frequently alternating constipation and diarrhea in the absence of any disease process. It is usually accompanied by abdominal pain, especially in the lower left quadrant, bloating, and flatulence. Other symptoms, such as heartburn, lower back pain, and agitation, may be present concurrently. The cause of irritable bowel syndrome is unknown; on examination there are no physical abnormalities. The symptoms result from a disturbance of the normal peristaltic movements of the lower intestine. IBS is the most common gastrointestinal complaint in the United States. It affects twice as many women as it does men. In some individuals it is made worse by emotional stress, spicy foods, or excessive caffeine consumption. Symptoms can be minimized by a high-fiber diet and antispasmodic drugs. Acupuncture is helpful in many cases.

irritable bowel syndrome Also known as spastic colon or mucous colitis. Abnormally increased motility of the large and small intestines, leading to pain and alternating diarrhoea and constipation; often precipitated by emotional stress.

irritable bowel syndrome (IBS, spastic colon, mucous colitis) (i-ri-tă-bŭl) n. a common condition in which recurrent abdominal pain with constipation and/or diarrhoea continues for years without any general deterioration in physical health or detectable structural disease.