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 Dermoscopy of pigmented oral lesions; A research study ScienceDirect Approaches to the evaluation of lip hyperpigmentation Vachiramon 2012 International Journal of Dermatology Wiley Online Library