I've been having this feeling that I'm bruised but when I look in the mirror, I see nothing. There is no discoloration or outline of it. This is just below my breasts in the center and is about 2" sq.

Any of you have this annoyance?

How long have you had this? It usually takes a little time for a bruise to actually develop in color. I've also heard of bone bruises before, where it's not the skin that's bruised, but whats underneath.

It has been there a while, meaning over a week. It is not on a bone. Picture between the breasts but lower by a couple of inches.