What Caused These Multiple Hyperpigmented Macules of the Mouth? Pigmented Lesions of the Oral Mucosa Springer Nature Link Oral melanotic macule" LABIAL LENTIGO, Labial Lentigo also called a labial melanotic macule, is a harmless, small, flat, brown spot on the lip. It can develop after repeated sun exposure. In most cases, labial lentigo Labial melanotic macule Pigmented Oral Lesions: Clues to Identifying the Potentially Malignant Consultant360