Dry hair occurs when the hair lacks the natural oils produced by the scalp to cover and protect the hair cuticle. Without this protection the cuticle tends to become rough and porous. Hair looses elasticity, splits easily, becomes dull and may become unruly. A variety of factors can lead to dry hair.
Permanent hair straighteners tend to dry the hair contributing to the loss of its natural oils. It is essential to give an extra special care to chemically straightened/relaxed hair.