How are birth marks formed?
Answer:
I don't know the answer but if the first one is right my leg was stretched a lot as I have a massive birth mark on my leg!!
From skin tearing due to sterching.
Definition
Birthmarks, including angiomas and vascular malformations, are benign (noncancerous) skin growths composed of rapidly growing or poorly formed blood vessels or lymph vessels. Found at birth (congenital) or developing later in life (acquired) anywhere on the body, they range from faint spots to dark swellings covering wide areas.
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