Labial lentigines, also called labial melanotic macules, is a benign skin condition that is more common in individuals with darker skin. They most often appear during adulthood although they can develop at Oral Melanotic Macule: Symptoms and Treatment Skinsight Labial melanotic macule Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Oral Mucosal Melanosis IntechOpen