Colitis is usually associated with infection, ischemia, and autoimmune response, and can be treated with general therapy and medication depending on the cause. 1. Infection: Most patients with colitis are infected with bacteria, fungi and viruses, and drugs should be used reasonably according to the type of causative agent. If the infection is bacterial, oral antimicrobials, including cephalosporin, penicillin, etc.; if it is caused by fungal infection, oral ketoconazole, miconazole, etc.; and about viral infection, oral ribavirin can be taken. 2. Ischemia: colitis may be induced when there is severe ischemia in the colonic ducts, which may cause abdominal pain and abnormal bowel movements. The use of vasoconstrictor drugs, such as posterior pituitary hormone, should be prescribed as soon as possible. 3. Autoimmune reaction: When autoimmunity is decreased or disordered, it may cause intestinal malnutrition, which may lead to colitis. Timely nutritional supplements, folic acid and vitamins are needed to alleviate the symptoms. Once you find out the colitis need to immediately seek medical treatment, and according to the doctor’s diagnosis to analyze the cause and then symptomatic treatment.