Doesn't whitening your teeth strain your teeth?

If you look at the reviews of people with whitened teeth, they say their teeth are cold, and I wonder if it's because they're risking a certain amount of strain.

1331 2017-08-10 Lady

A. 1

I heard that hydrogen peroxide water is applied to the teeth, but hydrogen peroxide does not strain the teeth.
I just heard that if you get it on your gums, it can irritate your gums.

Gentleman 7 years ago 0

A. 2

http://media.daum.net/life/health/wellness/newsvie...
Here's the answer

Lady 7 years ago 0

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