Lumbar dural sac compression, if the degree of compression is relatively mild usually do not have obvious nerve root reaction, if the degree of compression is more serious, there will be leg pain, leg numbness and other manifestations of nerve root irritation. When the lumbar dural sac is compressed, it is mainly due to the pressure on the outer dura mater, lumbar disc herniation, hypertrophy of the ligamentum flavum, lumbar spondylolisthesis and so on will cause pressure on the dural sac. The degree of compression is mild and there is no obvious nerve root response. If the compression is more severe, there will be symptoms of nerve root irritation such as leg pain and numbness in the legs, and also in some patients in the calves, insteps, backs of the thighs, soles of the feet, toes, and other parts of the body. If the symptoms of lumbar spinal dural sac compression persist without relief, it is necessary to seek medical treatment in time to reduce the adverse effects of the disease through “early detection, early diagnosis, early treatment”.