Tooth discoloration is a common cosmetic issue that can be addressed through teeth whitening. Teeth whitening, also known as tooth bleaching, is a dental procedure that uses bleaching agents like hydrogen peroxide or carbamide peroxide to lighten the natural color of teeth that have become darker or discolored over time due to factors like coffee, tea, tobacco, berries or curries. The teeth whitening procedure typically takes about an hour and uses a laser or light to activate the bleaching agents, resulting in teeth that are 5-6 shades lighter providing an instant brightening effect. With proper oral hygiene and avoiding staining foods and drinks, teeth whitening results can last up to 3 years.