In daily life, some patients with back and leg pain go to the hospital and after a series of examinations, they are diagnosed with lumbar spinal stenosis, and when the doctor recommends surgery, the patients all start to be afraid, worrying about the trauma of the surgery and the post-operative effect, so is lumbar spinal stenosis very serious? Does it necessarily require surgical treatment? Is there a minimally invasive treatment method? Here we briefly introduce the knowledge of lumbar spinal stenosis. Lumbar spinal stenosis refers to various forms of spinal canal, neural canal and intervertebral foramen stenosis, and soft tissue-induced changes in the volume of the spinal canal and the stenosis of the dural sac itself, causing a series of back and leg pain and a series of neurological symptoms. This is called lumbar spinal stenosis. Because of the narrowing of the spinal canal, the cauda equina nerve in the spinal canal is compressed, resulting in symptoms such as low back pain and leg pain. If the spinal canal is narrowed laterally, the nerve roots will also be compressed, causing interruption of the axial pulp due to pressure; impairment of nerve fluid function; relative expansion of the nerve sheath; stimulation of nerve endings; and tissue hypoxia due to obstruction of blood flow; restricted venous return and local stagnation, etc. These constitute the causes of lumbar pain. There are many causes of lumbar spinal stenosis, medically divided into two categories: congenital and secondary, with secondary being the most common, in which degenerative changes in the lumbar spine are the most important cause of secondary lumbar spinal stenosis. Similar to the reasoning that machines wear out over time, the human lumbar spine is slightly different in that it repairs itself when it wears out. Some of these repairs are beneficial and some are harmful. The harmful repairs caused by lumbar spine degeneration include bone spur growth and ligamentous hypertrophy, which can cause lumbar spinal stenosis and compression of the spinal cord and nerves. The clinical symptoms of lumbar spinal stenosis are mainly low back and leg pain, but they are different from the low back and leg pain caused by lumbar disc herniation. The pain caused by lumbar spinal stenosis is relatively mild, with a slow onset, intermittent claudication, and gradual aggravation, mostly without an obvious history of lumbar trauma. In most patients with lumbar spinal stenosis, pain in the lower extremities will increase after walking for a period of time, or there will be an obvious feeling of heaviness, as if the legs were filled with lead, and the symptoms will be alleviated after bending or squatting to rest for a period of time, and walking can continue. However, with the aggravation of the disease, the walking distance becomes shorter and shorter, but the patient may not be affected when riding a bicycle or bending over, which is because the lumbar spine in a bent state can relieve the compression and friction of the narrow spinal canal on the spinal cord and nerves. There are also some patients who have lumbar and leg pain that worsens at night in the bed rest state. These lumbar and leg pain characteristics can be used to identify lumbar disc herniation from lumbar spinal stenosis. The main measure of conservative treatment is functional exercise of the lumbar back muscles to strengthen the stability of the lumbar spine and relieve pain. In life, the patient will unconsciously keep the lumbar region in a forward bending posture. This posture can relieve lumbar and leg pain, but over time it will cause strain on the lumbar back muscles and new pain will appear. Once the disc herniation is accompanied by spinal stenosis, the use of traction, massage and reset can aggravate the edema of soft tissues and nerve roots in the spinal canal and aggravate the symptoms of compression, which is a sterile inflammation. CT-guided nerve root release therapy: For patients with lumbar spinal stenosis, CT-guided nerve root release therapy can be used if the following conditions are met: (1) Patients with lumbar spinal stenosis, especially those with intermittent claudication after walking only 400 meters or less (no diabetes, no serious cardiovascular or cerebrovascular diseases, no malignant tumors). (2) Patients with lumbar disc herniation and cervical disc herniation who are unwilling to undergo major surgical treatment. (3) Patients with lumbar pain for more than 3 months, excluding disc herniation, who have ineffective or unsatisfactory conservative treatment (excluding diabetes mellitus). (4) Neck and shoulder pain, more than 3 months, except for disc herniation, patients with ineffective conservative treatment, except for diabetes This method is a green minimally invasive treatment with lasting efficacy among conservative treatment methods because of its low risk, simple operation, obvious postoperative effect, no side effects, short hospital stay, and no application of hormones.