A port-wine stain is a vascular birthmark caused by abnormal blood vessel development in the skin. It appears as a reddish or purplish discoloration, often on the face, neck, or limbs. These marks are present at birth and tend to darken over time. While harmless, they can cause emotional distress and may be linked to underlying conditions. Advances in laser therapy and port-wine stain treatments in Leesburg, FL, now provide effective ways to reduce their appearance.