Multifocal Pigmentation of the Oral Cavity The Journal of the American Dental Association An oral melanotic macule is a harmless dark spot found on the lip, most often the lower lip, or inside the mouth, either on the gums, inside the cheek, or on the roof of the mouth. An oral melanotic Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com