Definition
A nevus flammeus, also known as a port-wine stain, is a birthmark characterized by a flat, dark red or purple discoloration of the skin. It's caused by an abnormal formation of tiny blood vessels. Unlike 'stork bites' that often fade, port-wine stains tend to be permanent and can become darker and thicker over time. Imagine it as a permanent, artistic splash of color on your skin. These marks don't usually cause any other health problems but can sometimes be associated with certain syndromes. Treatment options, like laser therapy, can help lighten their appearance. Think of it as nature’s unique way of marking you.