Is it true that neural stenosis causing back pain.

I am 28 year old woman. I have back pain and doctor suggested for MRI. Here is the result of MRI At l5-s1 posterior disc bulge with central disc protrusion indenting on anterior thecal sac and causing bilateral moderate to severe neural  stenosis What does it mean? Is it any serious issues? Thanks.

 

Is it true that neural stenosis causing back pain.
Physiotherapy