Not Cancer! Understanding Dark Spots in the Mouth, Have you noticed a dark spot on your lips, gums, or inside your mouth? Dont panic! In this video, Dr. Shifali Arora explains melanotic macules a This is a picosecond laser treatment of labial melanotic macules on the gingiva. Note the green flashes of the 532 nm laser as well as the immediate tissue whitening of the treated area. This Pigmented Lesions of the Oral Mucosa Pocket Dentistry A and B) Clinical appearance of a melanotic mandibular gingival lesion Download Scientific Diagram