If there is atherosclerosis, narrowing of the lumen, coldness, numbness, pain and walking disorders in the limbs, along with pale skin color, this kind of obvious ischemia can improve the arterial blood supply and local blood circulation, and reduce the symptoms to avoid amputation by using vasodilator needles. However, if the above situation does not exist, but only hope to improve the state of blood vessels and prevent atherosclerosis through the injection of vasodilator, this situation is not desirable, and the latest research has also proved that this method of using drugs is not beneficial.