A birthmark is essentially any mark, bump or spot that appears on an infant’s skin around the time of birth. These marks can be categorized based on their composition.
Birthmarks that result from excessive buildup of melanin pigment are referred to as pigmented birthmarks. Most of these birthmarks range from blue/grey to brown to dark black. Some birthmarks are white, called nevus depigmentosis, that can occur due to a lack of melanin in that area of skin. There are some birthmarks that are comprised blood vessels referred to as vascular birthmarks. These are typically red, purple or blue.
The majority of birthmarks most likely result from defective cell migration during fetal development and are benign. They typically do not require treatment, but should be monitored periodically for any change or development of symptoms.