My oldest son, now 7, was born with one on his forehead, right between his eyes, it goes from about eyebrow level almost all the way to his hairline. It was very noticeable at birth and the DR. told us the same thing...that it will most likely disappear with time....well like I said he is 7 now and still has it. It has faded some but I can absolutely still see it. It becomes more noticeable in the summer time when he gets tan...or when he runs and exerts himself.
~I was VERY concerned when he was born because I didn't like the idea of him having this birthmark so prominent on his face, his was more purple looking, but still kinda red and VERY noticeable....but ya know what? It is him, it is who he is and how he was made...and I do not even care anymore. He is still a very good looking boy and if anything I think it gives him character.