I have gallstones and get right shoulder blade pain frequently I've learned to live with.
However recently whenever I've had any acute pain to the "head" area the pain refers right down the right side of my back
For example
I went to a holistic therapist/physio/chiropractor for something else. He cracked my neck and when he cracked the right side a horrendous piercing pain shot down my back
Another time it happened I got some lip filler in and when the girl put the needle through my skin the same thing happened. Piercing pain right down the right side of my back.
Why does this happen 😖