It is known that one of the first features that people recognize in others is that of the smile. If you are embarrassed about your yellowed, stained, or discolored teeth, then you are probably not smiling to others in a way that is memorable or noticeable. Teeth whitening can lighten their color to give you the confidence to smile again and be proud. Teeth whitening is done by modifying the color of their enamel. Once you have achieved the desired level of whitening, you must take care to avoid doing things to your teeth that would allow them to become discolored again, such as infrequently getting your teeth cleaned by a professional hygienist.