Lumbar spinal stenosis is most often seen in middle age and older, and is more common in men than women. Generally speaking, the symptoms of the disease occur slowly and are occasionally aggravated by trauma and weight bearing, mainly manifesting as lumbar pain and intermittent claudication. Low back pain is mainly manifested as long-term recurrent lower back, sacral and hip pain, unilateral or bilateral pain, which may radiate to the lower limbs. Low back pain and radiating pain in the lower extremities, with severe sensation of downward swelling of the lumbosacral region as well as bilateral or unilateral buttocks, accompanied by paralysis of the lower extremities, which can be relieved or disappeared after squatting, sitting rest or bending, and worsened after standing, lumbar back extension or walking. Intermittent claudication is the most common symptom of spinal stenosis, which refers to the pain in the lower back and legs, lumbosacral swelling, or pain radiating to the lower extremities, and numbness in the lower extremities after walking a certain distance, which is relieved by squatting or sitting down to rest before continuing to walk. As the disease worsens, the walking distance becomes shorter and the time needed to rest becomes longer. Some patients may have dyspareunia, male sexual dysfunction and abnormal perineal sensation. Patients with lumbar spinal stenosis have no significant discomfort when sitting or lying down, and no significant discomfort when riding a bicycle, but when walking, they may experience back and leg pain. (This is because cycling is mostly bent over, and the diameter of the spinal canal is larger when bent over than when straight over, so the symptoms can be reduced or even disappear when bent over, so it is more tolerable when cycling. (When walking with a straight back, the ligamentum flavum folds and the diameter of the spinal canal becomes smaller, which aggravates the symptoms and causes pain when walking.) It is characteristic of this disease that patients with lumbar spinal stenosis have more symptoms but fewer or lighter signs, and it is more difficult to detect positive signs especially after rest. The general physician insists is visible pressure pain next to the spinous process of the lower lumbar spine, and when the lumbar back is extended, the pain increases due to the reduction of the effective space in the spinal canal, which restricts the lumbar back extension. Straight leg raise and straight leg raise strengthening tests are usually negative, and the neurological examination of the lower extremities is generally normal. The bending test is mostly positive. In other words, if the patient is asked to speed up the walking speed, the pain will increase. If the patient continues to walk, the patient will adopt a bending position to relieve the pain, or bend the waist in a sitting position, which can also relieve the symptoms.