I'm thinking that if the steroid shot worked, there must be local inflammation causing the pain. If it's inflammation that can be helped by steroids, maybe it isn't nerve pain from MS? Have you exhausted every other way of reducing the inflammation? Physio, diet changes, other anti-inflammatories, etc.?

I'm with you on hair raising with these kind of procedures. I think you have to really weigh the risk/benefit factors. If you're incapacitated by the pain, then the benefits probably outweigh any risks.

I'm a chicken, though, so that always affects my thoughts/decisions!

I hope you find some relief, one way or the other - I occassionally annoy my sciatic nerve and it's no fun. (my right leg, too!)

C