like Ginger,
I also had problems working on the "frozen-shoulder" when I started, having been trained to look and work locally. I have since then made it a point to ALWAYS look at the whole spine when treating people with shoulder (upper & lower extremity) disorders. More often than not, treating the cervical and thoracic spine gave much better results than treating the shoulder only.
I also used the german(massage) technique called bindegewebsmassage a lot to help treat many so-called musculoskeletal problems.

It really helps to look at the whole picture, the patients posture, his/her response to pain and most importantly, what is happening/has happened in his/her "muscle train and/or meridiaan.

the more you learn, the more you realize you know so little

Esther