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Mongolian blue spots



Mongolian spots are flat, blue, or blue-gray skin markings that commonly appear at birth or shortly thereafter.

See also: Rashes

Alternative Names

Mongolian spots; Congenital dermal melanocytosis; Dermal melanocytosis


Mongolian blue spots are common among darker skinned persons, such as those who are of Asian, East Indian, and African descent.


Mongolian spots are noncancerous skin markings and are not associated with disease. The markings may cover a large area of the back.

Occasionally, Mongolian blue spots are mistaken for bruises, which can raise a question about possible child abuse. It is important to recognize that Mongolian blue spots are birthmarks, NOT bruises.

Symptoms include:

  • Blue or blue-gray spots on the back, buttocks, base of spine, shoulders, and other body areas
  • Flat area with irregular shape and unclear edges
  • Normal skin texture
  • The spots are usually 2 - 8 centimeters wide
Signs and tests

No tests are needed. Your doctor can diagnose this condition by looking at the skin.

Support Groups

Expectations (prognosis)

The spots often fade in a few years and are almost always gone by adolescence.

Calling your health care provider

All birthmarks should be examined by a health care provider during the routine newborn examination.


There are no complications.


No treatment is necessary or recommended.


Review Date: 4/10/2009
Reviewed By: Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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