My shoulder is also bad. Had X-rays done & I have a torn rotator cuff. It causes pain in the shoulder, all the way down your arm and pain down the back of your shoulder. I’ll get it fixed after some other surgeries heal. Your symptoms sound exactly what I feel everyday. Please find a good ortho Dr who specializes in shoulder & arm replacement.
Hope this helps and you can find some relief
Rise

See Ortho I had similar few yes ago ended up having scope because I had a labral tear! Ouch! Good luck hope you find relief and what’s wrong.

ARTHRITIS, Are you seeing a Rhumitologist?

Shoulder and neck pain, are normal now these days. No release even with pain killers. Together with hands that are painfull , I am OK !!!!

I am having that problem now... rheumatologist sent me for pt to see if that helps.. I had a few injections they didn't work,, so I guess this is the next step.. he seems to think might be some inflammation around the rotator cuff but doesn't think is a tear yet