cutchiesgal

i have always had a little spot on my left breast, when i say spot, i dont exactly know what it is, it looks like a tiny blood blister, but im not too sure, at least one doctor has seen it when i had my son, and he didnt think it was anything to worry about, in fact he didnt even mention it when he saw it.
it is purple/dark red in colour and it is just bigger than the mark a pin would make.
it has never given me any pain at all, but sometimes it feels kind of puffy if i run my finger over it it is like it is kind of inflamed and bumpy and it seems to be getting bigger.
today when getting changed i noticed blood on my hand, i looked down and noticed that the thing was bleeding, now i am getting worried.
does anyone have an idea what it could be?