Clinically, compression of the dural sac is due to aging, degeneration and hyperplasia of the patient’s bone, resulting in narrowing of the lumbar spinal canal space, narrowing of the vertebral body space, and hyperplasia of the vertebral body itself, which compresses the cauda equina nerve within the dural sac, and a series of symptoms of nerve injury. If the herniated nucleus pulposus of the lumbar disc protrudes and compresses the dural sac, resulting in radiating pain and tingling in both lower limbs, muscle weakness, decreased skin sensation, the patient’s inability to bend over, positive local pressure pain, and positive percussion pain. In case of lumbar spinal stenosis after compression, the patient will have significant intermittent claudication when walking. After these symptoms appear, the patient can go to the hospital to take X-rays or CT films of the lumbar spine to make a clear diagnosis.