While most patients tolerate professional teeth whitening without a problem, some patients do report some mild side effects. The most common side effects include gum irritation and tooth sensitivity.
Avoiding Gum Irritation
Gum irritation occurs when your whitening gel comes into contact with your gums. When placing the whitening gel into your custom trays, it is important to use only the recommended amount so that it does not ooze out of the trays and onto your gums. If your gums appear white or irritated, the best way to avoid it in the future is by using only a tiny dot of gel in each tooth receptacle.
Some patients often complain of tooth sensitivity after whitening. Tooth sensitivity can range from mild to severe. You may just feel sensitive breathing in cold air or drinking an iced beverage, or you could feel sensitive all of the time and your teeth might send you a little zing every now and then.
How To Prevent The Irritation
The best way to deal with tooth sensitivity is to cut back on the frequency with which you whiten your teeth. Instead of whitening every day, whiten every other day or every three days. If you experience sensitivity, you may want to avoid whitening at night where you are asleep because you might leave your trays in for too long.