Teeth whitening is generally safe when done under the supervision of a dentist. However, some people may experience temporary sensitivity or irritation of the gums. It is important to follow the instructions carefully and avoid overuse of whitening products, as this can damage the teeth and gums.

It is also important to note that teeth whitening may not be suitable for everyone. Individuals with tooth decay, gum disease, or other dental problems should have these issues addressed before undergoing whitening treatment. Additionally, teeth that have been restored with crowns or veneers may not respond to whitening treatments and may need to be replaced to match the shade of the surrounding teeth.