Lumbar spinal stenosis is essentially age-neutral, occurring from adolescence to old age. A small percentage of patients with severe symptoms who have to undergo surgery are also teenagers. This makes the patients wonder why young people have an old age disease. In fact, the human spine is like a big tree, the lumbosacral spine is the root, the thoracic spine is the trunk, and the cervical spine is the top. To be healthy, the spine must be balanced by gravity, and the entire spine is actually a circular movement with the lumbar spine (root) as the center of gravity. To put it simply, the lumbosacral spine is the base of the entire spine, and the human lumbar spine is the mechanical foundation of the entire spine. The normal lumbar spinal canal is a long, thin tube, which is composed of vertebral bodies, vertebral arches, vertebral plates and intervertebral discs, ligaments, joint capsules and other substances commonly known as soft tissue, which houses the nerve tissue. Due to congenital factors (including nutrition, trauma, etc.), the lumbar spinal canal itself becomes smaller due to dysplasia in adolescents, which is called congenital developmental lumbar spinal stenosis. This stenosis is a fixed bony stenosis, a static stenosis, in which the nerves in the stenotic spinal canal are repeatedly irritated and compressed, resulting in a series of clinical symptoms. We see general lumbar spinal stenosis as a disorder of vertebral curvature, mechanical imbalance, compression of nerves, distortion of blood vessels, and involvement of muscles and ligaments, resulting in a variety of symptoms. This dynamic stenosis can be treated by changing the physiological curvature of the lumbar spine, thereby increasing the tissue space around the spinal canal. In contrast, congenital lumbar spinal stenosis is a bony narrowing, and the volume of space cannot be changed by adjusting the curvature, so it cannot relieve congenital developmental lumbar spinal stenosis. The clinical symptoms appear during the growth and development period of adolescents, and the symptoms are heavy and the cauda equina nerve is obviously compressed, and in severe cases, urinary and fecal incontinence and paralysis may occur, so surgery is required. However, this type of patient only accounts for 1%-2% of patients with lumbar spinal stenosis. It is not very common. Therefore, lumbar pain in children and adolescents should not be ignored. If the symptoms are sudden and do not improve after rest, you should go to the hospital for further examination to avoid delaying the condition.