Ma'anar ƙamus na "harshen furry" yanayi ne inda saman harshe ya bayyana an lulluɓe shi da wani abu mai kama da fari ko rawaya. Ana iya haifar da wannan yanayin saboda tarin matattun ƙwayoyin fata, ƙwayoyin cuta, da tarkace a saman harshe. Sau da yawa ana danganta shi da rashin tsaftar baki, bushewar baki, shan taba, shan barasa, wasu magunguna, da kuma yanayin rashin lafiya kamar su thrush, lichen planus, ko harshe yanki. Furen harshe ba wani yanayi ba ne mai tsanani kuma ana iya magance shi ta hanyar inganta tsaftar baki, shan ruwa mai yawa, guje wa taba da barasa, da yin amfani da goge harshe ko goge goge. A wasu lokuta, ana iya rubuta magungunan rigakafin fungal ko ƙwayoyin cuta don magance cututtukan da ke cikin ciki.