Inflammatory bowel disease (IBD) is a term for a group of inflammatory conditions of the bowel and intestine. Crohn's Disease and Ulcerative Colitis are two of the most common specific conditions. Symptoms include abdominal pain, nausea, diarrhea, and rectal bleeding. Treatment depends on the individual patient. The choice of medications and how to administer them (oral, rectal, injection, infusion) depends on factors including the type, distribution, and severity of the disease.