Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier Hunziker syndrome Oral Melanotic Macule: Symptoms and Treatment Skinsight Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360 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