Individuals who do not have any tooth or gum disease that might interfere with the process may undergo teeth whitening treatment, but they must first be assessed by a dentist before the procedure can be performed. After being treated by their doctor, those who have extensive cavities and gum disease should not have the whitening procedure performed on their teeth. Apart from that, it is not suggested to use teeth whitening on individuals who have not finished their growth and development, pregnant women, or nursing moms, among other things.