See a dentist: There could be several causes. Anything from infection to autoimmune conditions could be the cause. It is best to get it evaluated and make sure it is not something serious.
Answered 9/11/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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