A port-wine stain is a reddish-purple mark on the skin. It is usually present at birth. It does not go away on its own. However, it can be treated.
Port wine stains are caused by a problem with small blood vessels in the skin. Blood vessels normally open and close. In this condition, the blood vessels stay open. Blood fills the vessels. This causes a purple color and raised skin.
There are no known risk factors for this condition.
Port wine stains are more common in people who have:
These are conditions that affect the blood vessels.
The marks vary in size. They are usually on the head, neck, arms, and legs. Their appearance may change:
In children—they are flat, red, or light purple.
In adults—they are raised and purplish, getting darker and thicker over time.
They may bleed when scratched.
Marks near the eyes may cause eye problems.
The doctor will ask about your symptoms and health history. A physical exam may be done. Port wine stains can be diagnosed based on how they look. If the doctor has any concerns, a biopsy may be taken. If the eye is involved, an eye exam may be done. You may also need to see a doctor who treats skin problems.
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