Such features include an extra fold of skin beneath the lower eyelid ( Dennie-Morgan infraorbital folds), which represents a mild infraorbital dermatitis; nipple eczema; allergic shiners; and white dermatographism and vasoconstriction that supervene quickly after the skin is scratched, indicators that replaced the typical early red line of the wheal-and-flare response and which have been interpreted as an abnormal vascular response.