yesterday gf and I went to waraku east coast to eat ...she
ordered ..... lots of soy .... -_-
I suspect it's the long hours on the computer .... right hand's
always up moving the mouse ... 
ahhh.. i know that muscle.. i once taught TX how to deal with it..
it's gonna hurt..
basically, get someone to help... if it's the left shoulder, put
the arm into a "hammerlock" then get that someone to help rub the
part underneath the shoulder blade.. it hurts like a $#%# but the
relief after is worth the pain..
the chinese tui na sinseh does that... only it hurts hell of a
lot more and the relief is amazing.. bonus is if the sinseh puts
you in a full nelson and cracks the hell out of your upper
back..