What is your actual shoulder problem, Carol? Not frozen shoulder, is it?
I had frozen shoulder in my left shoulder for about a year to 18 months before I went to see my GP (general practitioner). I had physiotherapy to start with, but it had got to the stage where I had to undergo arthroscopic surgery last autumn. I've since regained significant movement, but it's far from perfect. Now the right shoulder is starting to go.
Apparently diabetics are more prone to frozen shoulder, but this condition, as far as I know, is not classified as a diabetes-related complication.