Split ends, a common hair concern, occur when the protective outer layer of a hair strand, known as the cuticle, breaks or splits apart. Often resembling frayed rope ends, they can give hair a frizzy, damaged appearance.
Split ends result from various factors such as chemical treatments, heat styling, environmental stress, and improper hair care practices. They can reduce hair's elasticity, making it prone to breakage and further damage. Historically, split ends have been addressed with trimming, which removes the affected portions, preventing their progression up the hair shaft.