Hello,
I started perusing this post because my 65 year old uncle had a severe stroke two weeks ago. However, when I saw your frozen shoulder subjet, I wanted to share my experience with frozen shoulder. I am a 45 year old active, healthy woman who experienced this two years ago. I tried painful physical therapy but only made baby steps. I then took the surgery option, actually it is an outpatiend procedure called Manipulation Under Anesthesia (MUA). Within 48 hours of this procedure I was 90% healed with full mobility. I wished I would not have wasted all that time in therapy. It did not good and the MUA was not painful. I am relatively young, so I had minimal concern for a break, but I know that is a bigger concern in older patients. Good Luck.
She needs to go to a pain specialist, M.D. type. It is impossible to advise on a problem like this via a column of this type. Sometimes, in some cases, with some patients, the answer is to exercise through the limit of pain. This is contrary to common sense, which tells you that "Pain means I am damaging something and is a sign to stop movement". If you don't use range of motion through the limits of pain, the movement of the limb becomes more and more restricted.