According to any number of medical web sites, the Mongolian Blue Spot is commonly found on infants of "darker skinned races such as Asian, East Indian, and African." It is also found on Native American Indians and even some Eastern European Jews. The blue spot is thought to be evidence of Mongol genetic ancestry.

In traditional Korean culture, the blue spot is said to originate from the grandmother spirit or "Samshin Halmoni" slapping the baby's butt when it is born.