About ten years ago I had a frozen shoulder which lasts through three phases, each phase being 6 to 9 months long:
(1) Severe pain
(2) No pain but extremely limited movement
(3) Slow (painless) recovery
So about a month ago I had the same sort of pain and figured it was yet another frozen shoulder. I already knew from past experience that there is no cure - you just have to go through the phases and that's all there is to it.
So I settled in for nine months of pain.
But then the pain moved to my upper arm, then my lower arm, and last week my fingers got very weak.
So now I knew it wasn't a frozen shoulder and quickly booked a meeting with the doctor. She was immediately concerned and sent me for X-rays at the hospital across the road. After seeing the results, she became even more concerned and sent me back to the hospital for CT scans.
Long story short - by the end of the day I was diagnosed with lung cancer.
Life is full of surprises.
I'm pretty sure I'll be home by Sunday, so I'll wait until then before I add more details to this thread (at the moment I'm using a borrowed computer so I can't use it for long).