E.B.
My daughter had one. It grew quickly and continued to grow, which was a little alarming to me as a non-medical person, but not to the doctor. The doctor kept monitoring it, and told us what to expect, and sure enough, one day it began bleeding. Not gushing but oozing. We knew not to touch it, we just put a loose bandage over it (gauze only with tape around the edges of the gauze). The doctor quickly removed it with just a local anesthetic and it was not painful to her. The removal basically involved slicing it off which sounds troubling, but it wasn't. It healed very quickly. Now there is a small pale flat spot where the hemangioma used to be, barely noticeable. I wouldn't call it a scar. It's just a slightly paler spot that we can see because we knew where the hemangioma was.