Damaged hair refers to hair that has been harmed by various factors, leading to changes in its texture and appearance. Common causes include excessive heat from styling tools, chemical treatments like coloring or perming, and environmental factors such as sun exposure and pollution. Damaged hair often appears dry, brittle, and frizzy, making it difficult to manage. When hair is damaged, the protective outer layer, known as the cuticle, becomes compromised. This can result in split ends and breakage, which may require trimming or specialized treatments. Regular use of conditioners and hair masks can help restore moisture and improve the overall health of damaged hair.