Desensitizer: First of all, having sensitive teeth is not normal although it is a common problem. Find out why they are sensitive and have a plan to reduce sensitivity. Whitening is known to cause sensitivity even for those who are without sensitivity. Applying potassium nitrate before ; after whitening greatly reduces sensitivity. Ask your dentist. It is also an active ingredient in sensodyne tooth pastes.
Answered 9/16/2015
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