Do those type of birthmark disappear? If yes,how fast? And what tile of doctors perform them?
Yes, they can - in fact weekly laser treatments can involute or hasten the disappearance. These birthmarks, as contrary to the name don't usually appear at birth but shortly there after. They go thru a growth phase, static phase, then involution or regression (start to shrink)- the whole process can take several months. Ulceration can occur, and if it does one must prevent infection. We now know that laser is both safe, and effective. Several treatments are needed for best outcomes. See a laser paediatric dermatologist or plastics in your State.CheersDr Davin LimLaser DermatologistBrisbane, Australia