While teeth whitening kits are mostly harmless, even the best teeth whitening kits have some possible side effects that you should be aware of. For most people, the most serious side effects from whitening kits are mild gum inflammation and some sensitive teeth. However, they may also cause a degree of burning and nausea. This is especially true if you end up swallowing the chemicals that are being used to whiten your teeth. To mitigate these side effects you should not brush your teeth prior to using a whitening kit, because this may irritate your gums further. If you have seriously problems with sensitive gums, you can consider shelling out some extra money for a custom molded teeth whitening tray that will ensure most of the bleach stay s on your teeth and off of your gums.
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