Connecticut Hairdresser Licensure Practice Exam 2025 - Free Hairdresser License Practice Questions and Study Guide

Heat styling tools damage hair primarily by causing dehydration and breakage. When hair is exposed to high temperatures from tools such as flat irons, curling wands, and blow dryers, the moisture content in the hair can be depleted. This leads to dry, brittle strands that are more susceptible to breakage. The heat can disrupt the internal structure of the hair, specifically damaging the protein bonds that give hair its strength and elasticity.

While enhancing hair color, increasing shine, and improving texture might be desirable outcomes of certain hair treatments or products, they do not directly contribute to heat damage. Engaging in heat styling without protective measures can ultimately compromise hair health, making it vital to use heat protectants and limit the frequency of high-heat styling to minimize these negative effects.