Oral medicine: 7. red and pigmented lesions Dental Update Olanzapine Induced Black Hairy Tongue During Treatment of Hebephrenic Schizophrenia Decompensation: A Rare Case Report and Brief Review of the Literature Cureus Successful treatment of melanotic hyperpigmentation of the tongue with a Qswitched Alexander laser: A case report Sun 2023 Photodermatology, Photoimmunology & Photomedicine Wiley Online Library Pigmented lesions of the oral mucosa and perioral tissues: a flow chart for the diagnosis and some recommendations for the management ScienceDirect Pigmented Lesions of the Oral Mucosa Springer Nature Link Dark Spots on Tongue Treatment New York, NY