International Academy of Cosmetic Dermatology
Mongolian spots are blue-brown stains that may look like a bruise and are usually present at birth over the lumbar spine, buttocks, side of the body, or shoulders. They are more common in Asian children.
They often fade naturally over time generally do not require any treatment; however, lasers can be used to lighten Mongolian spots and improve their appearance.
Mongolian spot on a six month old. (Wikimedia Commons)
Rodney Sinclair, MB BS
Melbourne, Victoria, Australia