"Stork Bite" Never Faded. I Am Interested in Removing It but Haven't Found Any Info. About Stork Bites on Adults. (photo)

My birthmark was apparent sense birth. Was told it's a "stork bite" and it would eventually fade away by the time i was 2-3 years old. Now I would like to remove it but I have never heard of a case of "stork bite" in adults. It is in the shape of upside down triangle directly in the middle of my forehead, it has faded sense childhood, becomes darker when my body temp. rises turning more red and when it lowers turning more purplish yet at a calmed state it isn't so obvious. how can I treat this?