Inflammatory bowel disease describes conditions that cause parts of the gastrointestinal (GI) tract to be come inflamed. The cause of IBD is an abnormal reaction of the body’s immune system wherein it attacks the GI tract, causing inflammation. Common symptoms of IBD conditions include abdominal pain, diarrhea or constipation, bloody stool and the urgency to have a bowel movement. Two common inflammatory bowel diseases are ulcerative colitis and Crohn’s disease.