Did they remove the whole rib or leave a stump?
Has this been the same all along sine the surgery or was it OK and then got bad again?
Did they do anything with the scalene muscles - cut , move , re-sect them?

If you aren't sure you can get the surgical report, it should have all the details.

Did you have a very experienced surgeon?

Basically I'm wondering if it might be scar tissue & adhesions, or if not enough was looked at during the surgery.