Port-Wine Stains

A port-wine stain is a mark that is usually present at birth. It is made of enlarged blood vessels. This makes it appear as a reddish-purple patch of skin. Port-wine stains are generally harmless. They may cause emotional and social problems due to their visibility.

  • Causes

    Port wine stains are caused by a problem with the small blood vessels in the skin. Blood vessels can normally open and close to meet the needs of the skin. In port wine stains, the blood vessels stay wide open. Blood fills the vessels causing the purple color and raised skin. It is not clear what causes the problems with the blood vessels.

  • Definition

    A port-wine stain is a mark that is usually present at birth. It is made of enlarged blood vessels. This makes it appear as a reddish-purple patch of skin.

    Port-wine stains are generally harmless. They may cause emotional and social problems due to their visibility.

  • Diagnosis


    A port-wine stain can typically be diagnosed based on its appearance. In some rare cases, a
    skin biopsy
    may be done.

    Since some stains may also be associated with other medical conditions, your doctor may order other tests to look for any of these related conditions.

    Skin Biopsy
    Skin proceedure
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  • Prevention

    Port-wine stains cannot be prevented.

  • Risk Factors

    There are no known risk factors for port-wine stains.

    Conditions associated with port wine stains include:

    • Sturge-Weber syndrome
    • Klippel-Trenaunay-Weber syndrome

  • Symptoms

    Symptoms include a mark that may be:

    • Reddish or purplish in color in adults
    • A flat, red or light purple lesion in children
    • Raised in adults
    • On the head or neck
    • Bleeding when scratched
    • Dark and thick over time

    A port-wine stain near the eyes may cause other problems.

  • Treatment

    Talk with your doctor about the best treatment plan for you. Treatment options include: