As a hair care expert with years of experience in the industry, I can tell you that bleaching hair is a process that can indeed cause significant damage if not done correctly. The use of bleach is potentially the most damaging of all hair colouring methods, which is why it's highly recommended to have it done by a professional. The chemicals in bleach can strip the hair of its natural oils, leading to dry, brittle, and inelastic hair. This can make the hair more susceptible to breakage and the formation of split ends. When considering a bleach treatment, it's crucial to weigh the aesthetic benefits against the potential harm to your hair's health. If you decide to bleach your hair, it's important to take proper care afterwards, which includes using deep conditioning treatments, minimizing heat styling, and possibly using protein treatments to help restore strength and elasticity to the hair. read more >>

BLEACHING HAIR AND DAMAGE. Of all colouring methods, bleach is potentially the most damaging, and therefore should ideally always be done professionally. ... Damage from bleach includes dry, brittle, inelastic hair, and hair that is more prone to breakage and split ends.read more >>