Not likely: Usually whitening your teeth will only cause them to get whiter. What you may be experiencing is just the tooth color returning to its normal shade. It may just be more noticable because you have come used to the whiter shade. If you feel like the whitening is not lasting long enough, or returns to its original shade too quickly, you may try an alternate method of whitening. Good luck!
Answered 10/23/2017
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Coffee or tea: A cheap whitener along with drinking large amounts of coffee or tea can cause yellow stains or an antibacterial mouthwash.
Answered 2/19/2013
5.3k views
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