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 Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics Pigmented Lesions of the Oral Cavity Geeky Medics Labial melanotic macule. B). Increased numbers of me lanocytes along Download Scientific Diagram