Does tooth whitening

In the event of sensitivity for any reason, there is a product available through your dentist called GC Tooth Mousse - ask your dentist.

I found it sensitive on one tooth only and that was on the 5th time I tried. This did stop the next day within 3 hours and was only for split seconds every now and then.  Many people feel no sensitivity, it varies.  My wife found it painless and she normally has sensitive teeth.  Your teeth can become sensitive to cold air or liquids during the tooth whitening process. This will stop when you stop whitening.  You can help to decrease this sensitivity if it arises.  You can whiten every other night.  A dentist can prescribe a fluoride gel that you can place in your custom whitening trays every other evening.  The fluoride coat helps to seal the tooth surface. It will not affect the colour of your teeth. This can be a reliable way to decrease sensitivity while you whiten.