I can still recall how frustrated I felt when , as a new graduate , working in isolation , I faced up to dealing with numerous "frozen shoulders" or the other common name "
rotator cuff syndrome " , with only what I'd been shown at University to guide me. Frustrating because , the best efforts I could manage at the shoulder, proved useless to fix these vexing and common problems. It was only when I discovered a relationship between relevant spinal
facet joint dysfunction and the shoulder , that my success in really eliminating these problems began. Over the years since my first discovery , I have found similar relationships to exist between spinal facet dysfunction and the consequence , nerve root irritation , in the cause and better still , the cure for numerous other musculoskeletal conditions.
There are web sites whose principal therapist posters regularly describe and allude to these kinds of neural relationships , should you wish to see an alternative to plodding away at structures which have referred pain.
I can recommend Somasimple for one.
Rehabedge also has rheams of informative material , including my own work on the physiology of spinal and referred pain ( look in the manual therapy section ). Idiopathic shoulder pain is almost always referred pain from spinal joints, but is commonly misdiagnosed , mistreated and confused , in the minds of therapists and MD's alike. Adherance to a pathological model of insight and treatment will only lead you further away from the answer.