I've had frozen shoulder in both shoulders in the recent past. Neither was injured beforehand in any physical manner. I agree with the exercise treatment. It

I've had frozen shoulder in both shoulders in the recent past. Neither was injured beforehand in any physical manner. I agree with the exercise treatment. It worked for me both times. In the end I found that swimming, breast stroke and then freestyle, worked best for me. For me the first couple of lengths were searingly painful but after ten or fifteen minutes it was really surprising how quickly the pain diminished. Each swimming session kind of followed the same pattern, acute pain at first that slowly faded. After maybe a dozen sessions over six weeks it was pretty much gone. One more anecdote.