Hi there, I seem to have done something to my upper right arm , it s been hurting for about four months now. To begin with I thought I d just slept on it funny and then the pain seemed to go away for a bit , but recently it s back. I only get pain when I lift it in a certain position and it makes me wince and sometimes there s just a constant dull ache. I was just wondering if this was most likely a strained muscle? And what s the best way to let it heal? Thanks Anna.