what is disc space narrowing
L-5 is the 5th lumbar vertebra in your spine. S-1 is the first vertebra in the sacral region of your spine. Narrowing of the disk space is when the area between L5 and S1 is now compressed. You have pads between the vertebral discs and a space between each vertebra. When this area is compressed, for any reason, the space becomes smaller. You can end up with pinched nerves very easily then.