1. It says that the disc between L5 and S1 vertebral
body is degenerated leading to decrease in space between the vertebral body,
2. There is a small bony projection (osteophyte
) behind the vertebral body but inside the vertebral canal which is indenting your spinal cord
and also pressing the s1 nerves on both right and left side,
3. There is arthritis
of a joint between those two vertebra's with secondary changes due to prolonged inflammation, which is finally causing a very mild narrowing of the canal through which the nerve is emerging out of the spine.
All these changes indicate a chronic low back ache. You can give a trial of physiotherapy
with intermittent pelvic traction along with life style modifications - using hard bed, changing sitting posture frequently, avoiding lifting weights by bending your back, etc.. These may improve your symptoms.