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 (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Pigmented lesions of the oral mucosa and perioral tissues: a flow chart for the diagnosis and some recommendations for the management Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Intramucosal melanocytic nevi CCIDE Dove Medical Press Differential diagnosis of an oral mucosal pigmented lesion: a case of essential melanosis