Hello, I have a constant pain running down my right arm. sometimes the ache is in my shoulder or lower between elbow and shoulder, pain also seems to move down into forearm. Right now I cannot raise my arm above chest high. I have my right arm in a sling so I don t use it. Pain is sharp when I raise my arm at chest height and non existent when arm is resting in sling. I am thinking a pinched nerve in shoulder or neck, or pulled muscle in arm.???