I have no idea if this is muscles or bones or some really irritating curse, but it's been going on for almost two years now.
It doesn't just ache, or burn, or much of anything in my day to day life, but if I pull my shoulderblades together (as though I were trying to touch them together) I get a "sharp" (probably a 3 from 1-10 pain scale) and persistant pain just between my right shoulder blade and spine until I stop trying to contract them--feels a little like a weak sprain pain or something. Of course, since I know it hurts when I do that I do it all the time and then complain about it.
Also this pain increases in intensity to around a 4 if I tilt my head back as far as it can go while contracting my shoulder blades.
And as I'm sure I'll mention again, no pain if I don't do that exact manuever. Well sometimes, if I hiccup and have air get caught in my esophagus it'll trigger it too, but that's it as far as I know. No loss in range of motion or anything.
I also have extreme heartburn and whatnot, complete with almost noticeable lump from time to time, and panicked myself on the internet with things like gallbladder issues and esophagus cancer (I'm 26, eat fairly healthy, but work in a technical callcenter and don't do anything to strain myself) and realised that I'm being silly since this isn't extreme pain or even a constant one.
Sometimes, out of the blue, I'll have a few days where it'll get really bad (still only noticing it when I do that precise manuever with my shoulder blades/head tilting)--and some days where it's practically non-existant.
The only thing I remember happening before it started was I was at a party and drinking and goofing off or whatever, and suddenly my entire chest (from shoulder to shoulder, top and bottom of sternum, and from spine to sternum) was on fire. Like someone poured acid inside of me. That subsided after laying down for a few minutes (5-10) and never happened again. Since then I have my odd and annoying pain that I wouldn't even notice except that I've noticed it and so constantly do the "bruise test" (you know, a bruise that hurts only when you poke it, so you poke it all the time).
Any ideas? Doctors haven't been helpful at all, and aside from really scary things they roll their eyes at, I have nothing to recommend they check for!
Oh and one more thing, I accidentally found out that if I do my "manuever" and lean against a pole or something that is exactly high enough to poke that portion of my back while I lean back--sometimes I can cause something to pop, and it relieves it a little bit, but not completely.