Change your method of expression! You will not die from a white tongue coating. It will make you feel like shit but it will not kill you. You need to break this kind of thinking because it is not helping you.
A white tongue coating can mean excess Yin which does affect mood and energy levels. A red tongue without a coating means higher energy levels, better mood and better nervous system function. This is from TCM.
For your breath, you could try clove essential oil in water and washed around your mouth. It might help destroy unwanted microorganisms that can cause unpleasant breath. F ...
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