Teeth whitening is a cosmetic dental procedure that involves the use of bleaching agents to lighten the color of teeth. This procedure can be done as an office or home whitening. In-office teeth whitening is performed by a dentist and involves applying a high-concentration bleaching gel activated by a special light or laser to the teeth. At-home teeth whitening typically involves the use of custom-fitted trays filled with a lower-concentration bleaching gel that are worn for a specified amount of time each day.

Teeth whitening can be helpful in improving the appearance of discolored or stained teeth caused by aging, certain food and drink consumption, smoking, or poor oral hygiene. However, it should be noted that teeth whitening is not a permanent solution and results can vary depending on a person's tooth structure and lifestyle habits.