Illinois Cosmetology Practice Exam 2025 – All-in-One Guide to Master Your Licensing Test!

Using too much heat on hair leads to damage and breakage due to the high temperatures altering the hair's natural structure. Hair is made up of proteins, primarily keratin, and excessive heat can cause these proteins to denature, which means they lose their original shape and function. This can result in the hair becoming dry, brittle, and prone to split ends.

Heat styling tools, such as flat irons and curling wands, can create beautiful hairstyles; however, without proper heat protection and moderation, they can strip moisture from the hair, leading to weakened strands. The cumulative effect of frequent exposure can be significant, resulting in long-term damage.

Other options don't accurately describe the consequences of excessive heat. While some might believe it enhances shine, in reality, excessive heat can lead to a dull appearance due to the loss of moisture. Additionally, while it might soften the hair texture temporarily, the ultimate result of damage outweighs any short-term improvement. Lastly, claiming there is no effect is misleading, as the detrimental impacts of too much heat are well-documented in hair care.