Complete occlusion of arteriosclerosis of the lower extremities can be treated with bypass surgery if the proximal and distal vessels of the occluded artery are in good condition. Atherosclerosis of the lower limbs occurs most often in men between the ages of 50 and 70 years old, the narrowing of the lumen leads to complete occlusion, the patient will usually have numbness of the legs, a drop in skin temperature, intermittent claudication, that is, after walking for a certain distance the legs become sore and uncomfortable, the pain sensation will worsen, will be relieved after resting, and in severe cases, will have pain when resting or localized necrosis. Bypass surgery is also known as open surgery. This is one of the most effective treatments available for complete occlusion of atherosclerotic arteries in the lower extremities, but not all patients are eligible for the procedure, which requires examination and evaluation by a physician. If bypass surgery is performed, it is necessary to go to the hospital in time for a follow-up appointment to check the ultrasound and other conditions.