Spinal stenosis comes from pressure on the spinal cord and/or nerves after narrowing of spaces in the spine. Multiple areas of narrowing may be involved: the canal in the spinal column; the canals at the roots of nerves branching out from the spinal cord; or the openings between vertebrae where nerves leave the spine. Pressure in the upper or lower spinal cord may create pain or numbness in parts of the body. Spinal stenosis is mostly seen in people over 50.