What's a mongolian spot?

Common in newborns: Mongolian spots are bluish markings on the skin, normally on the lower back, often noted in the newborn period. Mongolian spots are common among darker skinned persons, such as those who are of asian, east indian, and african descent. They can be mistaken for bruises. They often fade with time and are usually gone by late the teen years. They cause no complications and do not need treatment.

Random genetic effec: Mongolian spots or patches are islands of skin with a tendency to form more pigment than the surrounding skin. They often have a bluish tint, occur mostly in the mid-line of the lower back but can occur in other areas. There is an ethnic (genetic) component, occurring more often in Asian & darker skin colored groups. They are a curiosity, not a disease.