Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis Lipo Naturals Ascorbic Acid Liposomal Vitamin C from Sunflowers, 15 oz Walmart.com Pigmented Lesions of the Oral Mucosa Pocket Dentistry Does anyone know what this black mark on my lip is? Started last August so it's I've had it nearly a year, was living in Spain at the time for 6 months Melanotic macule. Benign. Dark spot on labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight in single basal melanocytes; NO nests. More info like this in Lipo C Injections medicalweightlosscentersofamerica.com