Irritable Bowel Syndrome

Irritable bowel syndrome is a disease.

True.

Irritable bowel syndrome is a disease, although it is also called a functional disorder. Irritable bowel syndrome involves a problem in how the muscles in the intestines work and pain perception in the bowel. It is characterized by gas, abdominal pain, and diarrhea or constipation, or both. Although the syndrome can cause considerable pain and discomfort, it does not damage the digestive tract as organic diseases do. Also, irritable bowel syndrome does not lead to more serious digestive diseases later, such as cancer.

source: http://digestive.niddk.nih.gov/ddiseases/pubs//facts/index.htm