Table of Contents I. What is Irritable Bowel Syndrome? a. Diagnosing IBS II. Symptoms of Irritable Bowel Syndrome a. Abdominal Pain b. Constipation c. Diarrhea d. Other Symptoms What is Irritable Bowel Syndrome? Irritable bowel syndrome (IBS) is a chronic condition that affects the large intestine and can cause constipation or diarrhea for a long period of time. In the United States alone, IBS affects more than 25 million people, and can severely affect the lives of patients. IBS typically