Spot Dx — Why has this tongue turned white?

Dr Tami Yap

Kevin is a 27 year old office worker who is concerned about his tongue. In recent weeks, it has looked white. 

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Kevin is a 27 year old office worker who is concerned about his tongue. In recent weeks, it has looked white. He is concerned he has a yeast infection. 

Kevin has a background of allergic rhinitis for which he takes oral antihistamines as needed. He had a mild URTI about a month ago, from which he has completely recovered.