Hello, I'm a medical professional with a focus on dermatology. I can provide you with information about port wine stain birthmarks.

A port wine stain is a type of vascular birthmark that is characterized by a flat, pink, or dark red mark on the skin. These birthmarks are caused by an overgrowth of capillaries, which are the small blood vessels that nourish the skin. The color of the stain can vary from a light pink to a deep purple, and it usually does not go away on its own. Port wine stains can appear anywhere on the body but are most commonly found on the face, neck, or limbs.

Port wine stains are named for their resemblance to the deep red color of port wine. They are present at birth and typically grow in proportion to the child's growth. In some cases, these birthmarks can thicken and develop into a more raised, nodular appearance over time, which is known as a Klippel-Trenaunay syndrome.

The treatment for port wine stains can vary depending on the size, location, and depth of the stain. Options may include laser therapy, which can lighten the color of the stain, or other medical procedures that aim to reduce the appearance of the birthmark.

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A port-wine stain (nevus flammeus), also commonly called a firemark, is a discoloration of the human skin caused by a vascular anomaly (a capillary malformation in the skin). ... Either way, port-wine stains ordinarily persist throughout life.read more >>