Proctitis and colitis have different sites of development, so their differences are different. For example, the cause of proctitis is inflammation in the mucosa of the rectum and the surrounding tissues, resulting in blood in the stool, constipation, diarrhea, and there will be a burning sensation in the anus when the stool and other symptoms. The inflammation of colitis occurs in the mucosa of the sigmoid colon and the surrounding tissues, and the main manifestations are abdominal pain, pus and blood in the stool, diarrhea and constipation alternately, and there is a feeling of wanting to have a bowel movement, but there is no bowel movement or very little bowel movement and other symptoms.