Hi.
With regards to the lack of mobilty/movement in the shoulder.
I have had the diabetic frozen shoulder twice needing the cortisone injection treatment which cured this.
It occured in 6 monthly phases twice last year.
Best to pop down to see your GP and let him/her steer you in the right direction.
As if its 'not' the statins or sweetners causing this, you will be walking up the wrong street and messing about with medication that you do actually need.
Can you rotate your arm around to get arm in a coat?
Twist arm up to unclip / do up the bra?
Wash and brush your hair easily?
Reach up to higher shelf and lift things down?
Drive and push/pull gears into gear without pain or discomfort?
These are all things I was unable to do...
Hope this helps?
Anna.x