Osteo-arthritis -most probably not, as the X-rays were good. Rheumatoid - what is the way to find out? I have that on my list of things to ask the neuro next week.

Iactually have a visible ball (not sure how to describe it) on my upper back muscle; my physio told me I shouldn't worry and should swim more to get it go away. I think it got better in the summer. Sure I will want to have an MRI on that area though, even if it is "just" a muscle.

I surely do have hunched shoulders.

Neck muscles tight, yes, and only get better with lots of swimming.

I think I will have to do that MRI.