I have just started having a pretty strange pain in my back. This pain occurs whenever I move my left arm and the pain occurs in my upper left back/chest area. This pain literally just started, prior to this I have never experienced any similar pains in my back or in this area.
I cannot even guess what might have caused it, I was just laying on the couch watching some TV before I headed to sleep and by the time I got up and walked over to my bedroom I felt a sharp pain in my upper chest/back area.
By experimenting moving my arm in different ways, I can safely say that the pain is triggered when I move my arm in such a way that my shoulder is moving towards the inside of my body. (If I am point my left arm straight out to my left, and then move it to point straight in front of me). And also the exact opposite way (moving my arm from point left to pointing behind me).
I am going to try and get some sleep and hopefully things will be better in the morning but if that is not the case hopefully I can get some insight here. Thanks.