Polymyositis & Dermatomyositis Support Group
Polymyositis (PM) is a type of chronic inflammation of the muscles (inflammatory myopathy) related to dermatomyositis and inclusion body myositis. The inflammation is predominantly of the endomysium in polymyositis, whereas dermatomyositis is characterized by primarily perimysial inflammation.
I'm surprised the Prednisone didn't work. Maybe it wasn't a high enough dose or long enough to tell? Prednisone works on all types of inflamation. Of course, I'm not a doctor so I don't know. Maybe try an over the counter anti-inflammatory like Motrin or Advil. I had pretty good success with Naproxen too.
Hang in there and push for the care you need a deserve. I do hope you find some relief soon.