For the patient to appear leg can not walk, a, see the lumbar spinal stenosis, after the emergence of lumbar spinal stenosis, will lead to the spinal canal of the spinal cord compression caused by spinal cord conduction is reduced, which will lead to intermittent claudication, that is, the patient in walking will gradually appear leg heavy, can not walk situation, must rest for a period of time, only to be able to walk again. Second, it is seen in the middle-aged and elderly people who have degeneration and osteophytes in the joints of the lower limbs. When walking, the increased bone will stimulate the surrounding soft tissues, which will lead to obvious pain in the legs and inability to walk. Third, it is seen in patients with varicose veins of the lower extremities and venous valve closure insufficiency of the lower extremities, so that when walking, the legs will gradually appear heavy and unable to walk.