What Causes Persistent Pain And Freezing In Feet Post Spinal Fusion Surgery?

Phi. I was just looking to see how my neurosurgeon was rated. Dr Steven Casha. It says he's not found. He's in Calgary. I have had two fusions. L 3-S1. It's been one yr since the last but I still have some pain as well my feet are freezing all the time. I need to go back and see him. Cold feet? Could there still be degenerative discs leaning on the nerves?