My chiro does ultrasound at the beginning of every session- the whole area from base of skull to mid back, sides of neck, shoulder muscles and sometimes he does the IF stim {deep electronic stimulation}, or the low level laser {for specific sore spots}

you might ask if PT finds any trigger points while she is working on you or ask about sticky fascia

all these topics are in the stickys too.

have you ever been in a car accident, hit your head or shoulders hard, sports accident, falls - hitting your head or upper body?

that's one reason I see a chiro- many yrs ago {as a teenager}went off horse and landed on my head- was Ok for the most part minor concussion.
When i started researching about RSI and then finding info on TOS -
I also found out about how the c1/c2 can get out of alignment fairly easily and causes the body to get tilted out of symmetry.

nose got crooked, shoulders , hips rib cage= all slightly tilted
plus another car wreck -hit nose on steering wheel and cracked it so even more cooked now LOL