Medically reviewed to ensure accuracy.
they’re usually nothing to worry about.
What does a blue birthmark on baby’s skin mean?
Congenital dermal melanocytosis spots arebirthmarksthat often appear around a baby’s lower back, buttocks or shoulders.
But babies with light skin can sometimes develop congenital dermal melanocytosis, too.
Most of the time, congenital dermal melanocytosis is harmless and doesn’t raise the risk for skin cancer.
But the spots are tied to a slightly greater chance for certain underlying metabolic conditions.
Where do congenital dermal melanocytosis blue spots usually occur?
They’re most common around the lumbosacral area your baby’s lower back, buttocks or shoulders.
They don’t usually show up on the head or face.
What causes congenital dermal melanocytosis?
Chalk it up to simple variations in skin pigment.
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Do blue birthmarks disappear?
Sometimes congenital dermal melanocytosis can be confused with bruising, especially if it shows up in atypical places.
These blue birthmarks can be alarming the first time you notice one.
