Probably: Tobacco stain all over the back of your teeth. Usually precancerous white patches on y our cheeks and gums are usually a good hint to what you are doing.
Answered 4/12/2020
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A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
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