Dear user, Are you sure that this bruise has come up recently? Because, to me, it looks as if the rash has been there from before but you simply noticed it recently. If, however, you are correct that the rash came up recently, then, as it is painless, it might not be a bruise but something else. It could be a skin infection, an allergic reaction or a flat skin growth. I am quite certain it isn t a broken bone, for then, she would have been miserable when you touched and pressed it. I think you should visit her doctor and get reassured that nothing serious is present here. - Dr. Taher