What Is a Hemangioma?
A hemangioma (hee-man-jee-OH-muh) is a type of birthmark that happens when a tangled group of blood vessels grows in or under the skin.
- A hemangioma that a baby has at birth is called a congenital hemangioma.
A hemangioma (hee-man-jee-OH-muh) is a type of birthmark that happens when a tangled group of blood vessels grows in or under the skin.