Hair becomes frizzy when the cuticle is raised due to moisture imbalance, heat damage, chemical processing, friction, humidity, or naturally high porosity. While genetics influence hair texture, proper hydration, gentle handling, protective styling, and scientifically formulated hair care products significantly improve smoothness and reduce frizz. A consistent routine focused on protecting the hair cuticle is the most effective long-term strategy for controlling frizz and maintaining healthy hair.