Oral Mucosal Melanosis IntechOpen 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 Derm Dx: Dark Lesion on Lower Lip Clinical Advisor Oral pathology: Noting a pigmented macule that often presents a diagnostic dilemma Registered Dental Hygienists Dark Black Spot on Lip Dermatologist in Roorkee