Arizona Cosmetology Practice Exam

Over-processing and heat styling are two significant factors that can lead to hair damage. Over-processing refers to the use of chemical treatments such as bleaching, coloring, perming, or relaxing too frequently or incorrectly, which can weaken the hair structure, making it brittle and prone to breakage. Each application can strip the hair of its natural moisture, leading to dryness and damage.

Heat styling involves the use of tools like flat irons, curling wands, and blow dryers, which apply high temperatures to the hair. Excessive heat can cause the protein structure of the hair to break down, leading to changes in texture and increased susceptibility to split ends and frizz. The combination of frequent, harsh chemical treatments and excessive heat exposure creates a cumulative effect that severely compromises hair health.

The other factors listed, while they may contribute to hair condition, do not have the same level of damaging impact as over-processing and heat styling. For instance, humidity can affect the way hair behaves but does not directly damage the hair structure. Similarly, natural oils provide essential moisture and protection for the hair, while sun exposure can lead to fading and dryness but is generally less damaging than the mechanical and chemical stress brought on by over-processing and heat. Chemical-free products and regular trims are preventive