A hemangioma may be present at birth, but more often appears during the first several months of life. It starts out as a flat red mark anywhere on the body, most often on the face, scalp, chest or back. Usually a child has only one mark, but some children may have more than one, particularly if they're part of a multiple birth.
During your child's first year, the red mark grows rapidly and becomes a spongy mass that protrudes from the skin. The hemangioma then enters a rest phase and, eventually, it begins to slowly disappear.
Half of all hemangiomas resolve by age 5, and nearly all hemangiomas are resolved by age 10. Although the color of the birthmark also fades, faint — but permanent — discoloration of the skin or residual extra skin may remain.
When to see a doctor
Your child's doctor will monitor the hemangioma during routine checkups. Contact your child's doctor if the hemangioma bleeds, forms a sore or appears infected.
A hemangioma consists of an abnormally dense group of extra blood vessels. It's not clear what causes the blood vessels to group together, although there may be a hereditary component involved.
Hemangiomas occur more often in:
- Premature babies
- White infants
Occasionally, a hemangioma can break down and develop a sore. This can lead to pain, bleeding, scarring or infection. Depending on where the hemangioma is situated, it may interfere with your child's vision, breathing, hearing or elimination, but this is rare.