Teeth bleaching or whitening is a cosmetic dental procedure designed to lighten the color of teeth and remove stains or discoloration. It involves the use of bleaching agents like hydrogen peroxide or carbamide peroxide to break down stains, making the teeth appear brighter. Professional teeth whitening treatments, performed by a dentist, offer faster and more effective results compared to over-the-counter whitening products. The procedure can be done in-office using high-concentration bleaching gels and light activation or at home with custom-fitted trays. While teeth whitening is generally safe, temporary tooth sensitivity and gum irritation may occur. Regular maintenance and avoiding stain-causing foods and beverages help prolong the results.