The full name of necrotizing small enteritis is acute hemorrhagic necrotizing small enteritis, which is a type of acute enteritis associated with C aerogenes infection. The lesions of this disease are mainly in the small intestine, and the pathological changes are characterized by hemorrhagic necrosis of the intestinal wall, which may be related to intestinal mucosal injury, bacterial infection, and the action of enzymes. 1. Intestinal mucosal injury: because of ischemia and hypoxia, hypertonic solution, and some other abdominal arterial intubation, etc., may lead to vasospasm or thrombosis, and acute hemorrhagic necrotizing small bowel inflammation occurs. 2. Bacterial infection: for example, Escherichia coli, Clostridium perfringens, Enterobacter cloacae, and Klebsiella may invade the already damaged intestinal mucosa, leading to the development of acute hemorrhagic necrotizing small enteritis. 3. The role of enzymatic substances: it may be due to the role of enzymatic substances, leading to intestinal necrosis of the mucosa of the colon and small intestine. When acute hemorrhagic necrotizing small enteritis occurs, you should go to the hospital in time, and under the guidance of the doctor for appropriate treatment and therapy.