Port wine stains have nothing to do with wine. They are a type a birthmark, caused by dilated capillaries in your skin. With time, most port wine stains grow in thickness and color, creating a "cobblestone" appearance to the once smooth skin. It is important to treat the stain early and often until it barely remains, so it never goes into this growth phase caused by the dilatation of the abnormal vessels. The VBeam laser is perfect for port wine stains, targeting the superficial capillaries and actually rupturing the abnormal vessels. Expect to receive more than one treatment, and once eradicated, a yearly touch up may be necessary.