Capillary malformations are one of most common birthmarks and sometimes they represent a diagnosis challenge for the physician at first sight. New genetic findings during the last decade have allowanced the understanding of these birthmarks and the developing of more accurate treatments, although in most cases the treatment of choice is pulsed-dye laser with some exceptions. This overview will be focused on recognize and point out first assessment of nevus simplex, port-wine stain, reticulated and geographic capillary malformations, Klippel-Trenaunay syndrome, capillary malformations fast flow-arteriovenous malformation and cutis marmorata telagiectatic congenita.