Birthmarks are pigmented spots on the skin that are present at the time of birth or occur shortly after birth. The pigmentation can occur in a number of different colors like tan, dark brown, purple, red, black, pink, white, pale and blue. It is not necessary for everyone to compulsorily have a birthmark. These colored spots can be flat or sometimes be raised slightly above the skin surface. In some cases, the pigments also extend to the tissues under the skin.