Hi @ripley, pprednisone is a corticosteroid. When I had severe neck pain with GCA and leg pain and stiffness with PMR no amount of exercising, stretching, etc. helped because it's impossible to get blood flow to the affected areas. I don't think Fibromyalgia is easily diagnosed. I remember reading about pain points on both side of the body. Mayo Clinic probably has information posted on fibromyalgia.

The chapter on PMR and GCA in Cecil and Goldman's Textbook of Medicine advises physicians to try a diagnostic trial of steroids if sed rate and CRP are not elevated. If there is not a dramatic clinical response, it suggests pursuing alternate diagnosis - infection, malignancy, connective tissue disorder and hypothyroidism. So I hope that helps.