A member asked:

I have been feeling very weak lately. this morning my tongue was blue now it's yellow. why is this so?

A doctor has provided 1 answer

Not certain why: You will need an evauation. Most of the time tongue color can be related to food that you have eaten. Sometimes there can be other reasons for color change but I cannot put anything together to explain what you have noticed.

Answered 1/9/2017

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Why appears the yellow substance on tongue esspecially in the morning?

3 doctors weighed in across 2 answers