Flame naevus (naevus flammeus) is a congenital, superficial vascular tumour that may only appear during the first months. Its colour varies from pale red to darkening claret. So-called stork bites at the midline on the forehead or the neck become lighter with time. Dark port-wine stains only get darker with time. Extensive flame naevi on the limbs may be associated with hypertrophy of the limb (Klippel–Trenaunay syndrome), and flame naevi in the eye region with glaucoma or epilepsy (Sturge–Weber syndrome). Pulsed-dye laser therapy is most effective when given early.