When my daughter was born (7 years ago) she was born with a birthmark on her lower right leg. It ran from the bottom of her heel, over her ankle and almost half way up her leg (outside of leg). It was DARK red and was raised on the edges where it ended on her leg. The raised place had an appearance of hemangioma, but the remainder of the birthmark looked like a port wine stain. Our local dermatologist diagnosed it as a port wine stain when she was few months old. As she has grown, the size of the birthmark has remained proportionate to her leg....so it is about 1/3 up her lower leg. HOWEVER, the biggest changes were that the raised places are gone and the REDNESS is almost completely gone. What remains are a series of blood vessels very visible - mostly red and some purple in its place. I have never heard or seen of a "port wine stain" on the leg and I have never seen someone with a port wine stain (I've only known of on face) that fades this much. Could this have been something else? Is there anything I should watch for in her? I maybe over reacting but I notice that she complains of her foot "going to sleep" A LOT.
Thanks for any thoughts/advice/information.

Optional Information:
Person's Gender: Female
Person's Age: 7