IF you have gone to a rheumatologist and you have checked your blood for high sugar, then that sort of leaves TOS, in my opinion.

It is my belief that the TOS nerves as they are compressed and misfiring then cause the brain to start searching out new pathways that can interfere with lower body extremities.

But no doctors will agree with this. I'm not big on the docs right now, as I've heard way to many false "talk" by them about TOS. I trust my own body.