Left shoulder has been acting strange for about 4 weeks and I do not remember injuring it (this time). Anything with left arm that is not straight in front of me brings excruciating pain to muscle in upper arm. Heat, like a hot shower right on the shoulder, makes pain disappear almost immediately. Shoulder has been injured at least three times but nothing in past 4 years. Yeah, when I hunch my left shoulder you can hear/feel clicks and pops. Any ideas? Got a good Doc that takes BCBS?