There are several posts on this topic throughout the forum-might take a bit of searching.
Try facet or steroid injection for a start.

Don't worry. It's a very common procedure, and a little bit of discomfort is about all you should experience.

I've had seven over the last few years, with the last one having seven actual injections, and it worked a treat.

You will feel a scratch and a sting as the local is administered, and then a slightly uncomfortable feeling as the steroid is injected.
If you like, take a pain killer an hour or so before.