The typical clinical manifestation of lumbar spinal stenosis is intermittent claudication. In patients with lumbar spinal stenosis, the nerves and spinal cord in the spinal canal are compressed and aseptic inflammation occurs. When walking, the area of the nerve needs more blood, the venous return in the spinal canal increases, the pressure in the spinal canal increases, the cauda equina is further ischemia, leg pain, leg numbness, weakness, the patient is forced to stop, sit for a while or bend forward, the volume of the spinal canal increases, the local compression is relieved, the venous return is increased, and the symptoms are improved. Mild patients walking up to 500 meters will have symptoms, severe patients walking up to 50 meters will have the above symptoms. In addition to walking intermittent claudication, clinical manifestations include low back pain, hip or leg pain, and limited lumbar spine movement.