Venous Lake Lip vs Melanoma: Differences Atrium Dental Figure 225 from Pigmentations of the Oral Mucosa and Facial Skin Semantic Scholar 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 Labial melanotic macule Kiss and Tell: Variations of Normal and Pathology of the Lips Today's RDH