Ulcerative colitis and Crohn's disease are the two major types of inflammatory bowel disease, which mainly affects the colon and small intestine. Ulcerative colitis (UC) causes inflammation and ulcers in the colon and rectum. Its prominent symptoms are abdominal pain and diarrhea mixed with blood. Ulcerative colitis can lead to the dilation of the colon, inflammation of the eye, joints, liver, or colon cancer. Crohn's disease may affect any segment of the digestive tract from the mouth to the anus. Symptoms are abdominal pain, diarrhea, fever, abdominal swelling and weight loss. Patients suffering from Crohn's disease are at a greater risk of colon cancer and small bowel cancer. This book tries to understand the clinical perspectives of colitis and Crohn's disease. It presents researches and studies performed by experts across the globe. The readers would gain knowledge that would broaden their perspective in this area.