I'm 20, female. I've had this gnawing, sometimes stabbing, pain under my left shoulder blade since I was 10 or 11. It's not debilitating but it is very uncomfortable. I've never had it looked at because of the hassle of testing and the vast number of things it could be (and of course if it's actually nothing then I've just lost a few hundred and it would still hurt).
Anyone know what causes this or where I should start in trying to get it fixed?