It's taken maybe 10 yrs for someone to actually state "TOS" and hit happen to be my chiro.
But w/ the adjustments, my neck has become more stiff waking in the a.m.
The upper back has always "locked" up or burned, especially after having spent time on my feet (like to cook, etc.).
Grew up weightlifting, heavy and maybe that has amped it over the years, i don't know.

But... get a good xray.
I'm weary of doctors, always have been. took getting married to actually consult docs on a regular basis. Wish i had been more persistent/consistent in my youth, saying that as a 33 yr old.