And mine, although my frozen shoulder was not linked to diabetes. (My physiotherapist said it was because I fell from a horse 40 years ago and slightly compressed my spine; with age, the consequences become more apparent.) The first time it happened, a few sessions of physio cleared it up. The second time it happened, on the other side, nothing worked, not physio, massage therapy, acupuncture, or electrical muscle stimulation. I was told to get an MRI (medical speak for "we don't know"). Around the same time, I read that if you just leave things alone, frozen shoulder often resolves on its own in a year or so. I left it alone, and sure enough, it went away. Obviously this won't be the remedy for everyone, and much will depend on the cause of your frozen shoulder.