A Problematic Oral Pigmentation: Deep Penetrating Nevus 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 Melanotic macules of the tongue in a newborn Journal of the American Academy of Dermatology What Caused These Multiple Hyperpigmented Macules of the Mouth? Oral Mucosal Melanosis IntechOpen Multifocal pigmentation of the oral mucosa The Journal of the American Dental Association