I took an arrow to the knee.
Rhomboids heal really slowly based on my experience and are easily re-injured once they feel "good" again, if stressed prematurely. All the classic remedies for a strained muscle work I believe, the problem being that those muscles are hard to isolate for therapy. I don't know crap about this formally, just been a victim twice.
"For a moment he felt good about this. A moment or two later he felt bad about feeling good about it. Then he felt good about feeling bad about feeling good about it and, satisfied, drove on into the night."
-- Hitchhiker's Guide to the Galaxy --
My father uses a TENS unit daily for his back. Works wonders for him and he can't make it a day without it.
Samsung Galaxy S II Skyrocket
AKA: SkyLine1