Although hemangiomas can be cosmetically worrisome to parents, concern should initially revolve around whether they are quite large or whether their size and location are causing secondary effects. For example, some children have had them very near their windpipe, resulting in breathing difficulty. Of course, these would warrant immediate attention. Sometimes hemangiomas can be associated with, or located near, other malformations.
Be reassured that most hemangiomas, like the one you described, do not require evaluation by a specialist who deals with these types of vascular growths. They can more easily be observed by your child's pediatrician and referral made if the diagnosis is in question, if the hemangiomas are medically problematic, or if you are in need of further reassurance.