Lumbar spinal stenosis is defined as a clinical syndrome resulting in pain in the lumbosacral region or lower extremities, with or without back pain, due to reduced space for movement of tissues such as lumbar spinal nerves and blood vessels. The incidence is approximately 30%, with a higher incidence over the age of 60. Lumbar spinal stenosis has few signs and symptoms, and the clinical manifestations are complex and varied, with varying degrees of severity. How can it be detected early? The following are some common manifestations that can help people diagnose themselves early and seek timely medical examination. The lumbar pain of lumbar spinal stenosis is different from that of lumbar disc herniation, in which the pain symptoms are more severe and sometimes the onset is acute and unbearable, requiring bed rest. The former is mostly manifested as lumbar back pain, which is obvious when the back is extended and relieved when the body is tilted forward. Lower limb numbness and soreness When sitting, there are no lower limb symptoms, but when standing, lower limb soreness, numbness and weakness begin to appear, and the symptoms disappear after lying down or resting in a seated position. Intermittent claudication This symptom is the most representative symptom of lumbar spinal stenosis and is manifested as follows: after walking three to five hundred meters, both lower limbs become sore, numb and weak, which can be relieved after squatting and resting for a while, and is not affected when riding a bicycle. With the aggravation of the disease, the walking distance is gradually shortened, gradually to 100 meters, or even 50 meters. It is mainly due to local ischemia and hypoxia of lumbar spine nerves and blood vessels after walking.