An infantile hemangioma is common type of birthmark that is made up of injured blood vessels that have been injured. Most infantile hemangiomas are not visible at birth but begin to appear during the first 4-6 weeks of life. All infantile hemangiomas will be visible by 6 months of age. Infantile hemangiomas will grow and change rapidly during the first few months of life.
Infantile hemangiomas are more common in girls, premature births, and in those of Caucasian descent.