I am not sure if this is the same problem as yours but I will tell you how I solved my rotator cuff problem
A few years ago, I had what I thought was a painful rotaor cuff. I don't know how else to describe it except that I had a pain coming from it.
I went by chance to get a massage, (not for the rotator cuff, just for a massage), and the masseuse asked if I had any particular pains or aches and I told him about the rotator cuff pain and he said, I can fix that! And he bent down by my armpit and put both thumbs really deep into my armpit and pressed really hard for a looong time. He said I had a knot in there. And presto!! The pain disappeared forever.
Hope this helps you.
Starting weight 238 lb's 12/23/05
Current weight 204.5 lb's
"The gods created certain kinds of beings to replenish our bodies...they are
the trees, the plants and the seeds."
Karen, a happy friend of God and a friend of earth and sustainability