One thing that did work for me was practicing my nunchaku techniques. I was suffering from a frozen shoulder for about 12 months and tried all the recommended exercises and pain killers from the doctor without much success. So last month I tried my nunchaku with a bit of caution. Get it wrong and you can hurt yourself.
I would recommend anyone wishing to try this should use foam Nunchaku’s or go to a qualified martial arts instructor. If you are wondering what they are I have attached a link to youtube video