Lumbar spinal stenosis and lumbar intervertebral disc herniation are different in terms of pathologic manifestations, clinical manifestations, and prognosis of disease course and age. 1. Pathological manifestations: lumbar spinal stenosis does not have obvious manifestations of disc herniation, mainly due to the reduction of intravertebral canal volume and compression of nerves due to the proliferation of articular eminence, ligamentous hypertrophy, and intervertebral disc degeneration. Lumbar disc herniation is due to the compression of nerves by the protruding annulus fibrosus and nucleus pulposus, resulting in lumbago and sciatica. 2. Clinical manifestations: Lumbar disc herniation usually manifests as nerve root compression symptoms, with pain radiating from the buttocks to the calves, and the straight leg raising test and its strengthening test are positive. In lumbar spinal stenosis, the test results are negative, and the main clinical manifestation is intermittent claudication, and the pain symptoms can be significantly relieved when resting in bed. 3. Prognosis: the course of lumbar disc herniation is shorter; lumbar disc herniation occurs in young adults and lumbar spinal stenosis occurs in middle-aged and old-aged people; the prognosis of lumbar disc herniation is usually better than that of lumbar spinal stenosis. When symptoms such as lumbar and leg pain occur, it is necessary to consult a doctor in a timely manner to clarify the lumbar spine CT and MRI, etc., so as to clarify the condition after differential diagnosis by a specialist, and to choose the appropriate way of treatment, which will help to improve the uncomfortable symptoms as soon as possible.