Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Spinal Stenosis ?
    ### Response:
    Your spine, or backbone, protects your spinal cord and allows you to stand and bend. Spinal stenosis causes narrowing in your spine. The narrowing puts pressure on your nerves and spinal cord and can cause pain.    Spinal stenosis occurs mostly in people older than 50.
    