Infantile hemangiomas (strawberry birthmarks) are one of the most common skin growths seen in infancy. They are a noncancerous overgrowth of blood vessels. The spots generally appear as a red patch in the skin that will grow to a red raised area over a short period of time. Any infant may grow a hemangioma, but we know they are more common in certain circumstances. The reasons for this are not clear. Girls have them more commonly than boys. They also occur more often in premature babies, or babies with a low birth weight.