Ischemic intestinal colic (ischemicintestinalcolic), also known as chronic mesenteric ischemia, refers to recurrent episodes of severe postprandial paroxysmal epigastric colic or periumbilical pain. Causes 1. Arterial diseases: Most of them occur on the basis of atherosclerosis, and the formation of wall thrombus and atheromatous plaque in arteries leads to lumen narrowing or even occlusion. While the vessel is gradually occluded, the collateral circulation of nearby vessels is also established, such as aneurysm, arterial stenosis, and aortitis. 2.Venous occlusive disease: Intravenous thrombosis is often secondary to intra-abdominal infection, hematological disease, trauma, pancreatitis, major intra-abdominal surgery, connective tissue disease, long-term application of adrenal corticosteroids and long-term use of oral contraceptives. 3, low perfusion heart failure: various causes of shock and blood volume deficiency, sudden drop in blood pressure, drugs or certain endocrine-induced constriction of small intestinal vessels. 4.Small vessel inflammatory diseases: such as Wegener’s granulomatosis, systemic lupus erythematosus, leukodystrophy, dermatomyositis, diabetes, hypertension, polyarteritis nodosa and allergic purpura can also involve small and medium-sized arteries and cause lumen narrowing and occlusion. 5, other: intestinal lumen pressure increase such as tumor obstruction, persistent constipation, etc.. Abdominal trauma and radiological disease, etc. The onset of disease is often the result of synergistic action of multiple factors. The celiac artery and the superior and inferior mesenteric arteries are mostly involved at the same time.