lingua villosa,or black hairy tongue,is normaly for persons who smoke,chewing tabaco,idem Spot.Or be caused by candida albicans...
Case of ligua vellosa most probbly causes by heavy smoking,irritated by chemical or by candida infection.
Hairy black tongue Is over growth of the papillae on the tongue. can be cause by a number of things..... Smoking, drinking tea, taking pepto bismol, dehydration, oral antibiotics, rinsing mouth with menthol or peroxide. Is a type of thrust can be treated with oral hygiene. If that doesn't work them treated for yeast infection or bacterial infection.