I noticed it yesterday, when it was red like a tiny drop of blood. It is right on the tip of my nipple. Today it is black (or a very deep purple- I assume it is still blood of some sort). It does hurt when ds feeds from this side, though he has a very good latch and doesn't actually seem to be in any contact with the black bit. It is only tiny, about the size of a pinhead, but it can't be right can it?! Is there anything I can do to get rid of it?