Mongolian Spots: Causes, Risks & Treatments Did you know about Mongolian spots? These blue birthmarks, also known as dermal melanocytosis, appear on babies due to an excess of melanocytes, giving them their darker skin tone. No need to worry, they are typically harmless and don’t require any treatment! #dermalmelanocytosis #mongolianspots #skintone #melanocytes #babybirthmarks #babysafety #newmoms #babies #google #momsofinstagram #parents #moms #babies | Dr.Santosh Yadav