Male sex, older age, poor oral hygiene, xerostomia, oxidizing mouthwashes, excessive black tea or coffee consumption, smoking or chewing tobacco, excessive alcohol intake, poor feeding, oral infections, status after a radiation therapy to the head and neck region, trigeminal neuralgia and drugs like steroids, antipsychotics, interferon [5], antibiotics as tetracycline and linezolid [3] , are the predisposing factors for developing BHT. In these cases exists a lack of normal desquamation with

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... umulation of the keratin on the filiform papillae of the tongue with its hypertrophy and elongation [6] .