And there are different degrees or severity of both TOS & RSD.

If you have a early dx of TOS and proper care you possibly can turn it around - especially if it is mostly postural, alignment and soft tissue based.
Or at least get it back to where you can function at most things as long as you are careful.
It's usually the long time to dx and trying to keep working while in pain that sets up the more severe cases. Some have gone to 10+ Docs before getting a correct dx. Most times the work comp system is part of the problem of delayed dx too as most RSI type of TOS is very hard to"prove" in cases like that.

Like RSD it doesn't usually show up on any easy to show tests- xray or MRI, or blood work etc.

basically that's why I mentioned it - just in case - so you don't go yrs with out knowing about a possibility of TOS and the knowledge of it.

Did you try the "hands up" test on the one website?
It isn't proof , but an indicator , it would show you if your pulse is getting stopped in your arms when up like that. There is a % of normal people can will lose pulse also in this position - but just something to look into more if you do.
here it is- http://www.nismat.org/ptcor/thoracic_outlet/