Inflammatory Bowel Disease (IBD) is a group of chronic inflammatory conditions of the digestive tract, primarily Crohn's Disease and Ulcerative Colitis.Crohn's Disease can affect any part of the digestive tract in patches, involving all layers of the bowel wall.Ulcerative Colitis is limited to the large intestine and rectum, affecting only the innermost lining continuously.The exact cause is unknown but involves a mix of genetics, immune system dysfunction, and environmental factors.Common symptoms include chronic diarrhea (often bloody), abdominal pain, fatigue, and weight loss. IBD is diagnosed via endoscopy, imaging, and lab tests.