• AR Children's Hospital Birthmarks Homepage This site has detailed information on birthmarks, particularly on hemangiomas.

• Birthmarks.com This site offers information and helpful sites related to various port-wine stain and other birthmarks, including contact information for physicians in this field.

• Hemangiomas and Vascular Anomalies Features detailed information on various birthmarks, hemangioma, arterial, and venous vascular malformations.

• International Society For The Vascular Anomalies The official site of the International Society for the Study of Vascular Anomalies.

• My port wine stain Information about port-wine stain and other birthmarks that present with skin lesions similar to port-wine stain. Useful links to other inbformative sites are provided.

• Vascular Birthmarks Foundation An international charitable organization that provides support and informational resources for individuals affected by hemangiomas, port wine stains and other vascular birthmarks and tumors.