Professional teeth whitening lifts the surface staining left behind by coffee, tea, red wine and everyday wear. A whitening gel is applied across the visible smile line and activated in the chair, so the work is done in one sitting rather than spread over weeks of at-home trays. It suits anyone with an event on the calendar, and anyone who has noticed their smile looking duller in photographs than it does in the mirror. Sensitivity differs from person to person, so your esthetician will go over what to expect with you before anything begins.