Birthmarks can have causes that aren't due to underlying disease.A birthmark is a congenital, ben…
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Birthmarks can have causes that aren't due to underlying disease.A birthmark is a congenital, benign irregularity on the skin which is present at birth or appears shortly after birth—usually in the first month. They can occur anywhere on the skin. Birthmarks are caused by overgrowth of blood vessels, melanocytes, smooth muscle, fat, fibroblasts, or keratinocytes.
