different types of birthmarks freckles
Pigmented birthmarks are usually brown patches on the skin caused by clusters of pigment cells. Examples of pigmented birthmarks include cafÃ©-au-lait spots, Mongolian spots and congenital melanocytic naevi. Pigmented birthmarks are different to vascular birthmarks, which are usually red, pink or purple and caused by abnormal blood vessels. The cause of pigmented birthmarks is not known. However, the amount and location of melanin (a substance that determines skin colour) determines the colour of pigmented birthmarks.
Salmon patches (also called stork bites, angel kisses, or macular stains) are the most common type of birthmark. They are thin, flat, light pink or red areas of colored skin that occur most frequently on the back of the neck (stork bites) and on a baby's upper eyelids, upper lip, or between the eyebrows (angel kisses).