Hair damage is more than just split ends. Extremely damaged hair develops cracks in the outside layer (cuticle). Once the cuticle lifts (opens), your hair is at risk for further damage and breakage. It may also look dull or frizzy and be difficult to manage. Damaged hair has a brittle, straw-like appearance. The hair shaft is fragile and prone to breakage, resulting in split ends and stray, unruly hairs. It will feel stiff and “crunch” upon touch with little movement.