Disorders of Pigmentation of the Nails and Mucous Membranes Springer Nature Link 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 Dermpath Made Simple Neoplastic: Oral Tumours Pigmented Lesions of the Oral Cavity Oral and Maxillofacial Surgery Clinics