Sun Sync Guide to Black Hairy Tongue #2
Here are some more causes of black hairy tongue (lingua villosa nigra) … 3) Bismuth can cause a black tongue. Natural sulfur in the mouth combines with bismuth to form black-colored bismuth sulfide. The most common bismuth drug is bismuth subsalicylate, e.g. Pepto-Bismol. Doctors sometimes call it Pink Bismuth. Pink Bismuth often darkens the stool…