Conversation: The conversation between human and AI assistant.
[|Human|] I am a 71 year old male. At the dentists office yesterday, she mentioned my black tongue. Didn"t  think much about it til I got home and looked in the mirror. What a shock!  brushed some away. But have plenty  in the back of the tongue.Can you tell me what causes this condition? Thank you
[|AI|]  Hello, Welcome Thanks for consulting Chat Doctor, I have gone through your query, as you have mentioned that you have black tongue don't worry it can be due to national deficiency or due to decapitation of papillae, You do is maintain proper oral hygiene, Properly cleaning of tongue, Take vitamin B 6, B12 supplements one tablet once daily for one week If then you won't get relief then go to dentist for oral examination and investigations if necessary go for biopsy Hope this will help you.  Wishing you good health.