Not common. Hemangiomas are benign overgrowths of blood vessels. The most obvious are on the skin and occur in infancy. But some also occur internally, most not causing a problem, but some associated with inherited vascular overgrowths and internal bleeding with changes in bodily function. See your family doctor or pediatrician if you suspect a problem in this area.
5-10% of 1yo's. Hemangiomas are one of the most common benign soft tissue tumors of infants, often over looked in newborns, they increase in size & density until ~1yo before going into a stable phaze, then softening & regressing. By 4-5y most have shrunk to a fraction of their peak size & leave a parchmant like skin surface over their exterior.