i thnk its a muscle pain? or something but definetly pain. Time to time maybe once every 2 weeks more or less i don't really keep track but i'd get this pain like someone just got something hot nd put it on my left shoulderblade it would start burning really bad where i don't want to move my left arm AT ALL then the burning pain would slowly go away but still their and then if i move my left arm the bone itself i guess hurts instead of burning like im pulling the bone out of place or something when im just tryin to move my arm or raise it a little so then i wouldn't be able to move my left arm at all again for a minute the entire burning and bone pain lasts about 3 min or less but never stayed it just came and went