Colitis is an inflammatory lesion of the colon caused by a variety of causes and is treated according to the cause. The patient needs to pay attention to adjust the diet, lifestyle habits, maintain water-electrolyte balance, etc.: 1. first aid measures 1. rehydration: patients with colitis can cause dehydration and electrolyte imbalance due to severe diarrhea, need timely rehydration to correct water-electrolyte disorders; 2. blood transfusion: patients with blood in the stool may appear anemia, serious cases need appropriate blood transfusion; 3. supplemental albumin: the occurrence of hypoproteinemia need timely supplemental albumin. General treatment: 1. Standardized diet: for those with malnutrition, a high sugar, high protein, low fat diet is advocated; in severe cases, fasting and nutrient supplementation through intravenous; 2. The main therapeutic drug is amino salicylic acid, glucocorticoids can be used in the acute active phase, and when ineffective, immunosuppressants and biologics can be used to maintain treatment; 2. Ischemic colitis: stop the use of vasoconstrictive drugs, control the primary disease, rehydration to improve microcirculation; 3. Pseudomembranous colitis: antibiotics should be discontinued early, and in heavy cases to metronidazole, vancomycin, etc.; 4, infectious colitis: according to the stool and drug sensitivity test selection of appropriate antibiotic treatment; 5, radiological colitis: through the local retention of enema, so that the drug and the lesion site fully combined. Such as anti-inflammatory drugs, steroid hormones, etc. Fourth, surgery is usually not required, such as combined intestinal obstruction, intestinal perforation, severe intestinal necrosis and other complications patients need surgery.