I too was just diagnosed with PMR. I have been treated for giant cell aortic arteritis. Just got off prednisone in July. By September I started having shoulder, leg, and arm pain. Had trouble combing my hair and sleeping on my side in addition to legs that ached. Apparently the former prednisone masked the PMR. Now back on 20 mg of prednisone and in four days, pain is gone. Plan now is to reduce the prednisone to 10 mg in two weeks. For anyone who has this, dont give up hope. There will be some solution to it even if the dosages of prednisone are different from mine.