Hi, I suffered a concussion about a month ago. They said it was a very minor one, infact it wouldn t even have been considered a concussion on the old concussion scale. But for some reason I had started to get pretty bad post concussion syndrome which is now slowly getting better. My only concern is about a week or two ago my back started hurting, more of a soreness feeling. It went from that feeling to now, I have the sensation of consistanly needing to crack my back, mainly in just the upper back. Also when I take a deep breath, not everytime, my upper back cracks but what feels like only one tiny part. The muscle soreness is still there as well. Any idea what would cause this?