Redsfan28,
Port-wine stains (PWS), or nevus flammeus: Dark, berry-colored stains that are present at birth. These vascular birthmarks range from pale pink to dark purple and can appear anywhere on the body, though they show up most often on the face or head. About .3 percent of infants are born with PWS. Light port-wine stains might fade, but most endure and get bigger as the child grows. Sometimes port-wine stains can thicken and darken (the birthmark on former Russian president Mikhail Gorbachev's head is an example). They can also form cobblestones, or small lumps, on the surface of the skin.