Asymptomatic hyperpigmented lesions on tongue Indian Journal of Dermatology, Venereology and Leprology case 348 what's black hairy tongue? lingua villosa Nigra, tetracycline, melanosis, leucoplakia ,navi Indian patient (mid 70s) with chief concern tongue is turning black. Swipe for more photos. These post inflammatory changes are more common in folks with more melanin in their skin. The underlying A rare case of melanotic hyperpigmentation of the tongue secondary to radiotherapy A) Hairy black tongue. (B) Linea alba. (C) Oral melanotic macule. (D) Download Scientific Diagram