Definition: Lumbar central canal, nerve root canal, lateral saphenous fossa or intervertebral foramen due to abnormal proliferation of bony or fibrous structures, resulting in different ranges of internal diameter narrowing, which causes corresponding clinical symptoms due to compression of neurovascular structures. Concept: Lumbar spinal stenosis is a symptomatic diagnosis: as long as the clinical manifestation of intermittent claudication is present, it can be diagnosed; regardless of whether the causative factor is developmental spinal stenosis, disc herniation or lumbar spinal slippage, as long as intermittent claudication is present, it belongs to the category of lumbar spinal stenosis, and when writing the diagnosis, lumbar spinal stenosis should be written in the front, followed by the specific causative factor. Intermittent claudication: The concept of intermittent claudication was first described by Verbiest in 1954 and is manifested by the presence of one or both sides of low back pain and numbness and weakness of the lower extremities after walking, relieved by rest, and recurring after walking. This concept includes two meanings: A, claudication is triggered by some characteristic discomfort of the lower limbs, i.e., the lower limbs become limp after walking a certain distance and have to stop and rest; B, claudication has its characteristic relief mode and relief pattern: after sitting or squatting to rest (i.e., after lumbar flexion), the symptoms will be gradually relieved and walking is possible again, but after a certain distance the symptoms recur and claudication occurs again, and so on and so forth . It should be noted that intermittent claudication of vascular origin due to inadequate blood supply to the lower extremities, representing such diseases as thrombo-occlusive vasculitis, which is a chronic systemic arterial disease with small and medium-sized arterial involvement, mostly seen in young adults, mostly with a history of smoking, intermittent claudication is not related to body position, and there are no symptoms of nerve compression, but there are manifestations of limb ischemia, such as loss of arterial pulsation after walking, bruising and pallor of the lower legs, dorsal foot The arterial and posterior tibial artery pulsations are weak or absent. Note: Patients with lumbar spinal stenosis mostly do not show symptoms of intermittent claudication when riding a bicycle, while symptoms caused by vascular disease will also show symptoms when riding a bicycle, as patients can observe themselves.