Dabbo had a great suggestion for sleeping with the tennis ball. My problem has been that I put my arm over my head while sleeping causing major pain when I wake up. I have found some solutions through many ideas that may help you. Sleep with your affected arm inside a t-shirt so it can't move or tie it at your waist with a robe belt. I don't know what is causing your arm to turn blue, but some ideas if they can help. Good luck and keep us posted as to what the doctor says. Linda