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What causes black-brown substance in the mouth?

Updated: 11/14/2022
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RuminCoke

Lvl 1
14y ago

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My daughter is 9 years old, she woke up this moring with a black/brown substance on her teeth and tongue with a vomit tast in her mouth. what can cause this?

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Wiki User

14y ago
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Q: What causes black-brown substance in the mouth?
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