I have an ach at the lower part of my right shoulder blade. I have full movement of my shoulder with no pain, just this pain when I move my arm in a certain way and when I sleep. Is it a form of bursitis or like my mother would say , you have a cold in your shoulder. I came on a chilly morning in Florida no doubt! Do I Ice it or do I use a heating pad? It doesn t feel like I pulled something or I would have more pain.