Capillary Malformations (Nevus Flammeus; Port-Wine Stain; Nevi Flammei) By Denise M Aaron, MD, Dartmouth Geisel School of Medicine Reviewed / Revised Jan 2022 | Modified Sep 2022 View Patient Education Diagnosis Treatment Topic Resources Port-Wine Stain Facial Port-Wine Stain Capillary malformations are present at birth and appear as flat, pink, red, or purplish lesions.