how’s your shoulder/neck/head posture?
and which muscles are you using to try and have good posture/hold your shoulders/neck/head?
until I saw an EDS understanding physio who found that I was using the wrong muscles and then worked with me on using the little small core ‘stabilsing’ muscles to hold myself, instead of what I ‘naturally’ did using the big outer ‘movement’ muscles- those big muscles were always hypertight=bringing spasms, perma pins and needles from my shoulder to my fingers and even blood flow probs in my arm
and ‘good posture’ of course wasnt really poss like that- but he also had to first teach me where exactly my shoulders were supposed to sit, they were ‘normally’ mostly out rather than in their sockets-
since then, and as long as I keep up with the exercises at least semi regularly… I dont really have those probs anymore ; )