Lifestyle choices like smoking, and food/drink consumption habits like tea, coffee, wine, etc., can lead to stains and discoloration. Aging can also be a contributing factor. In any case, the tooth discoloration and stains can hamper your facial aesthetics, and you might feel conscious of talking or smiling in public. ZOOM! Whitening is a bleaching process used across the world to remove stains and lighten the discoloration of your teeth.