Whitening, often referred to as bleaching, is a cosmetic process used to lighten the color of skin, hair, or teeth. In dental care, tooth whitening involves using products that contain hydrogen peroxide or carbamide peroxide to remove stains and discoloration, resulting in a brighter smile. In skincare, whitening products typically contain ingredients like hydroquinone or kojic acid that inhibit melanin production, helping to reduce dark spots and even out skin tone. While many people seek these treatments for aesthetic reasons, it's important to use them safely and consult professionals to avoid potential side effects.