My 4 year-old-daughter has bad breath, her tongue is white in the back w/bumps. What is this?

bad breath
Alison L asked:

She Also clears her throat frequently, and says she feels like there are “boogers” in her throat. I believe this is allergy related as she has done this off and on since the age of one. But the bad breath and white, pastey tongue is something new! I have no idea what this could be.

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