Whitening refers to various methods used to lighten the color of teeth, skin, or other surfaces. In dentistry, it often involves the use of bleaching agents like hydrogen peroxide to remove stains and discoloration from teeth, resulting in a brighter smile. In skincare, whitening products aim to reduce pigmentation and even out skin tone. These products may contain ingredients like hydroquinone or kojic acid, which inhibit melanin production. Both dental and skincare whitening procedures should be approached with caution and ideally under professional guidance to avoid potential side effects.