Hair damage refers to the deterioration of the hair's structure, often caused by excessive heat, chemical treatments, or environmental factors. Common signs of hair damage include split ends, breakage, and a dull appearance. When hair is damaged, it loses its natural moisture and elasticity, making it more prone to further harm. Preventing hair damage involves adopting healthy hair care practices, such as minimizing the use of heat styling tools, using gentle shampoos, and applying conditioners. Regular trims can also help remove split ends and maintain overall hair health. Protecting hair from sun exposure and harsh weather can further reduce the risk of damage.