2-3 weeks: If the underlying cause is a viral infection, it will usually run its course in 2-3 weeks. If the cause is bacterial, it may persist until the source of the infection is addressed. If it has been longer than 3 weeks in duration, best to get it evaluated by a dentist.
Answered 11/13/2012
5.5k views
10 to 14 days: It is a herpetic viral infection. They take 10 to 14 days to run their course.
Answered 12/10/2012
5.4k views
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