Melanotic macules of the tongue in a newborn Journal of the American Academy of Dermatology 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 Oral pathology: Noting a pigmented macule that often presents a diagnostic dilemma Registered Dental Hygienists Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com