Poor blood circulation in the lower limbs is due to the following reasons: First, insufficient blood supply to the arteries, commonly atherosclerosis of the lower limbs and localized plaque formation, and in severe cases, occlusion or even acute embolism. Patients will show pain, numbness, coldness and even necrosis at the distal end of the limbs in severe cases. Secondly, the venous system diseases, including varicose veins and venous thrombosis, will affect the blood return of the distal veins. The patient will show pain, distension, and in severe cases, venous gangrene, or even obvious tension blisters, so the limb should be elevated to actively improve microcirculation and other symptomatic treatment. For atherosclerotic occlusive disease, the underlying disease should be treated, changes in blood pressure should be monitored, and lower limb arterial angioplasty can be performed if necessary. During the perioperative period, vasodilating drugs should be given, and a low-salt, low-fat diet should be administered.