A: The medical term is a hemangioma, which is a birthmark made out of blood vessels. Hemangiomas usually enlarge in size and become raised over time, then eventually shrink up and go away on their own by the time a child is 10 (but many go away sooner than that). Isolated hemangiomas are not usually a problem, other than cosmetically, unless they are located in areas where their enlarging size might become an issue---like on the mouth, eyelid, or nostril. Since your baby's spot is in a location where it should not be an issue, just continue to watch it, but don't worry about it.
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