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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Black hairy tongue ： ウィキペディア英語版 Black hairy tongue Black hairy tongue (BHT, also termed lingua villosa nigra) refers to a condition of the tongue where the filiform papillae 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. ==Signs and symptoms== Hairy tongue largely occurs in the central part of the dorsal tongue, just anterior (in front) of the circumvallate papillae, although sometimes the entire dorsal surface may be involved.〔 Discoloration usually accompanies hairy tongue, and may be yellow, brown or black.〔 Apart from the appearance, the condition is typically asymptomatic, but sometimes people may experience a gagging sensation or a bad taste.〔 There may also be associated oral malodor (intra-oral halitosis).〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black hairy tongue」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.