Midline nevus flammeus (also known as salmon patch and 'angel's kiss,') is a vascular birthmark which may be found on the glabellar region or on one upper eyelid, and presents in approximately 15% of newborns. Midline nevus flammeus (also known as salmon patch and 'angel's kiss,') is a vascular birthmark which may be found on the glabellar region or on one upper eyelid, and presents in approximately 15% of newborns.