See doctor: You need to see a doctor and have them check this to make sure it is not a cancer or other serious problem in the mouth. It is probably just an area of darker pigmentation but you need to make sure.
Answered 9/28/2016
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5 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 3 answers
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