Ok...wow thanks trapper, I googled and read a few excerpts-but this happened AFTER the pull (sesame w/ 4 drops oregano, melvel)I don't smoke and am not on Antibiotics and am eating fairly clean (no meat or processed food-organic all the way)Its not black now, it "brushed off".I have had no oral health issues-strong teeth, only 2 cavities in my 40 years. Just a bit freaky, candida or mold caused-maybe? Gosh, so new at this...you should have seen my face when I saw my tongue was black!