Source: "Color Atlas of Pediatric Dermatology"; Dr. Samuel Weinberg, Dr.
Neil S. Prose, Dr. Leonard Kristal; Copyright 2888, 1998, 1990, 1975, by the
McGraw-Hill Companies, Inc. All rights reserved
Port wine stains are caused by abnormal development of blood vessels
(capillaries) and last a lifetime. The port-wine stain (also known as nevus
flammeus) appears as a flat, pink, red or purple mark, and occurs on the face,
trunk, arms, or legs.
If you or your child has a port wine stain present on eyelids, this is
thought to pose an increased risk of glaucoma, an eye disease associated with
increased pressure in the eyes that can lead to blindness if it's not treated.
more about port-wine stains, birthmarks, and other abnormal skin