Picture of Port Wine Stain
Port-wine Stain on Infant. Port-wine stains are permanent and often unsightly types of birthmarks which show up at or soon after birth. They are caused by an abnormal distribution of blood vessels called haemangiomas. They are harmless but can be a cause of embarrassment for some depending on the size or location. .They can be lightened by multiple laser surgeries.
Text Source: Mayo Clinic
Medline Plus / National Library of Medicine