For me, I had left shoulder blade pain due to my lumbar SCS. The rep. had to reprogram it as the stimulator was, as he put it, activating one of the nerves connected to my shoulder blade. It was very painful but after he tweaked me it went away after a week or so. Took some time for the muscle to calm down and stop hurting. In the meantime I got a kenalog/lidocaine shot into the area of my shoulder blade where it was really hurting, so that helped reduce the pain also.

Hope you get answers and relief!!