Olanzapine Induced Black Hairy Tongue During Treatment of Hebephrenic Schizophrenia Decompensation: A Rare Case Report and Brief Review of the Literature Cureus Pigmented Lesions of the Oral Cavity Pocket Dentistry Asymptomatic hyperpigmented lesions on tongue Indian Journal of Dermatology, Venereology and Leprology Congenital lingual melanotic macule Causes And Treatment For Black Spots On My Tongue NatruSmile A 9 year old boy presented for evaluation of dark spots on the tongue. The family first noted these spots 5 months prior and reported that they remained stable. Can you make a diagnosis?