Congenital dermal melanocytosis is a benign pediatric skin condition.

Insider Info: The former, non-P.C. name for this skin finding is “Mongolian Spot.” (I mention this in case you happen to come across this term during an internet search.)

What Do Congenital Dermal Melanocytosis Spots Look Like?

They look like bruises (even though they’re not). Because of their appearance, doctors typically make a note of them in their patients’ charts, so they don’t get mistaken for signs of child abuse.

What Causes the Spots?

They develop when extra pigment (melanin) is deposited in the skin (just above the bum, but not always). The spots are most prevalent in darker-skinned babies but can occur in all ethnicities.

Blast From the Past: 

Back in the day (like waaay back), people thought Congenital Dermal Melanocytosis spots were a “spank from the gods.” You don’t want to mess with Zeus!

The Bottom Line: Should I Do Anything About My Baby’s Congenital Dermal Melanocytosis?

Nope. The markings will fade over time and will probably disappear completely by early childhood.