Nevada State Board of Cosmetology Practice Exam

What can excessive heat do to hair?

1. It can enhance shine

2. It can cause color fading

3. It can cause damage and breakage

4. It can make hair more manageable

The correct answer is: It can cause damage and breakage

Excessive heat can have detrimental effects on hair, primarily leading to damage and breakage. When hair is exposed to high temperatures from styling tools such as flat irons, curling wands, or blow dryers, the hair cuticle can become weakened. This weakened state makes the hair more susceptible to dehydration and structural compromise. As the heat strips moisture from the hair, it can lose its elasticity, resulting in brittleness, split ends, and ultimately breakage. In contrast to the correct answer, options that suggest enhancement of shine, color fading, or increased manageability do not accurately capture the primary concern when it comes to excessive heat. While heat styling can initially create a polished appearance, the long-term consequences can be severely damaging, reinforcing why understanding the effects of heat on hair health is crucial for both professionals and clients in the cosmetology field.