Coloproctitis consists of two types of diseases: colitis and proctitis, which can cause abdominal pain, abnormal bowel movements, urgency and heaviness (discomfort in the lower abdomen, wanting to defecate very much, and a feeling of incomplete defecation after defecation), and other extra-intestinal symptoms and complications, and the specific manifestations can be different from one person to another. 1. Abdominal pain: colitis is mostly lower abdominal pain, hidden pain or intermittent episodes of pain; proctitis often have pain on the left side of the abdomen or pain during defecation. 2. Abnormal defecation: colitis is mostly manifested as diarrhea, among which, ulcerative colitis is mucus, pus and blood stool, Crohn’s disease is paste-like stool, infectious colitis is pus and blood stool or mucus stool, and ischemic colitis is bloody diarrhea; proctitis can be manifested as diarrhea, constipation, diarrhea and constipation alternately, or blood in the stool. 3. Acute and recurrent symptoms: mostly seen in patients with ulcerative colitis and proctitis. 4. Extra-intestinal symptoms: such as fever, oral mucosal ulcers, skin erythema nodosum. 5. Complications: anemia, fistula, intestinal obstruction, bacteremia, toxic megacolon, etc. are common. However, it should be noted that the performance of the above symptoms in specific patients can be individual differences, therefore, the diagnosis of colitis, proctitis must be completed by a professional doctor, do not blindly judge, do not dispose of, so as not to cause adverse consequences.