http://digestive.niddk.nih.gov/ddiseases/pubs/ibs/
National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health
Irritable Bowel Syndrome (IBS) is not a disease but a group of symptoms, including abdominal pain, cramping, bloating, gas, diarrhea, and/or constipation. Learn about the causes, symptoms, diagnosis, tests, and treatment for IBS.