Birthmarks and Hemangiomas InterNETwork Support -
 Support, resources, and information on medical treatment of birthmarks and hemangiomas.
http://members.tripod.com/~Michelle_G/indexH.html

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.
http://www.birthmarks.com

Hemangiomas and Vascular Anomalies -
 Features detailed information on various birthmarks, hemangioma, arterial, and venous vascular malformations. Explains prognosis, treatment, and tests' options.
http://www.birthmarks.us/

International Society For The Vascular Anomalies -
 The official site of the International Society for the Study of Vascular Anomalies.
http://www.issva.org

Mongolian Spots - DrGreene.com -
 Read an article that describes spots on the skin that are sometimes mistaken for bruises.
http://www.drgreene.com/21_1143.html

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.
http://www.myportwinestain.com

Shine On -
 Personal, yet informative site offering resources, feedback and support to others dealing with a similar situation.
http://www.angelfire.com/ab2/birthmarks

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. Also sponsors relevant research.
http://www.birthmark.org/