Labial Melanotic Macules in Atopic Dermatitis: An Observational Study Semantic Scholar COM Jan. 2008 Diagnosis UW School of Dentistry Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome ORAL MELANOTIC MACULE (OMM) (Also called focal melanosis labial melanotic macule) A benign, localized, flat pigmented lesion of the oral mucosa Caused by a focal increase in melanin production Does anyone know what this black mark on my lip is? Started last August so it's I've had it nearly a year, was living in Spain at the time for 6 months