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A member asked:
Purple sore in mouth, what can it be, and only lasting a day?
4 doctors weighed in across 2 answers
Accidental bruise: It sounds like you might have accidentally bit or bruised yourself.
Answered 12/14/2015
5.3k views
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Blood blister: Most likely a blood blister caused by trauma such as biting yourself. If it goes away after only one day and there is no pain or swelling associated with it than i don't think you have anything to worry about.
Answered 1/3/2018
5.3k views
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