A birthmark is a spot or a lump that your baby is born with or appears shortly after birth. It can be pink, red, tan, brown, or other colors. Some birthmarks are more common than others, some fade on their own whereas some tend to stay on the skin for life. Some birthmarks are completely harmless whereas others need immediate attention. Make sure to show your baby’s skin mark to your pediatrician, dermatologist or pediatric dermatologist as soon as possible.