Many middle-aged and older people, when it comes to back and leg pain, think that there is something wrong with the lumbar discs, but lumbar spinal stenosis is more common in people over the age of 50. In particular, manual laborers, frequent weight-bearers, and sports workers are at high risk for degenerative lumbar spinal stenosis. Typical symptoms of lumbar spinal stenosis are: pain and numbness in the lower limbs after standing for a long time or walking for a long distance, relief or disappearance of the symptoms when squatting or sitting down, and reappearance of the symptoms when walking again. This symptom is also known as intermittent claudication, which is clearly characterized by the fact that the symptoms worsen when the lumbar spine is in an extended position and are relieved when the spine is bent over. Therefore, patients often feel normal when bending over to ride a bicycle or climb a hill, but have difficulty walking upright. Some patients are able to walk normally at first, but slowly develop symptoms after a dozen steps. Lumbar spinal stenosis patients do not always have symptoms such as numbness in the legs and feet, some people experience lower limb pain, fatigue and other symptoms, which are often mistaken for old age or osteoporosis. Some patients are often combined with disc herniation, often ignoring the existence of spinal stenosis. Therefore, when there are obvious lower limb numbness, weakness, bending comfortably and other symptoms, we should promptly go to the hospital to receive relevant examinations, a clear diagnosis.