(HealthDay News) -- Hemangiomas, sometimes called strawberry birthmarks, are abnormally dense collections of small dilated blood vessels that occur on the skin.
They may begin as red lesions in the top skin layers, deeper in the skin, or a mixture of both, according to the U.S. National Library of Medicine.
Usually they appear at birth, but can show up several months later.
The danger with hemangiomas is if they enter a phase in which they grow rapidly in both volume and size. If they are on the face, this can be disfiguring.
Large hemangiomas may develop infections. Significant bleeding may occur if the area is injured.
Small hemangiomas on the surface of the skin may not have to be treated. However, a doctor should evaluate them to see whether surgery to remove them is necessary.
