Millions of people with a condition known as Irritable Bowel Syndrome (IBS) suffer from chronic or long-standing abdominal discomfort. Despite enormous research, a clear cause of IBS remains a mystery. This episode of Healthy Body, Healthy Mind explores the advances being made in treating IBS symptoms, which can range from constipation to diarrhea. One highlight is a look at how beneficial microorganisms called probiotics are making a big difference for patients.