Variations of oral anatomy and common oral lesions Anais Brasileiros de Dermatologia (Portuguese) 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 The labial melanotic macule: a review of 79 cases Lip Hyperpigmentation.pptx defines anatomy causes PPTX