Image on right from Wikipedia . For a relatively rare condition, black hairy tongue has received quite the national attention from CNN to the New York Post after a case report was published in the New England Journal of Medicine on 9/6/18. Normally the dorsal surface of the tongue mucosa is covered by filiform papillae protrusions that typically rise less than 1mm from the surface. However, in black hairy tongue , these normally very short tongue protrusions can grow to over 1 cm in l…