Hairy tongh from tobaco
What is Black Hairy Tongue? A black hairy tongue is a temporary and harmless condition that is often caused by an overgrowth of bacteria in your mouth. Certain types of bacteria accumulate on the papillae the small projections that cover the tongue and create red blood cell pigments, which can make the tongue look black. And if the normal shedding of the outer layer of cells on the tongue is inhibited, the papillae are larger and the tongue can appear "hairy.
What Causes a Hairy Tongue and How to Treat It
Black hairy tongue - Wikipedia
Black Hairy Tongue Causes, Symptoms, and Treatments
Hairy tongue results when the filiform papillae FP on your tongue do not shed as they should. FP are cone-shaped projections on the surface of your tongue. Like skin cells, the cells on your tongue have a life cycle that allows them to grow, serve their purpose, and then fall off. For people with hairy tongue, the FP grow longer instead of falling off.
Black hairy tongue is a condition of the tongue in which the small bumps on the tongue elongate with black or brown discoloration, giving a black and hairy appearance. The appearance may be alarming, but it is a harmless condition. Predisposing factors include smoking, xerostomia dry mouth , soft diet, poor oral hygiene and certain medications. Management is by improving oral hygiene, especially scraping or brushing the tongue.