What is a common cause of hair damage from chemical treatments?

High heat styling tools commonly cause hair damage during chemical treatments primarily because they can exacerbate the stress that chemical processes place on hair. When hair is chemically treated—whether through coloring, relaxing, or perming—it undergoes structural changes that can weaken its integrity. This makes it more vulnerable to additional damage from heat.

When high temperatures are applied, they can lead to moisture loss and weaken the hair's protein structure, resulting in dryness, brittleness, and breakage. Therefore, using heat styling tools on already chemically treated hair can significantly increase the risk of damage. Understanding the interplay between chemical treatments and heat application is essential for maintaining hair health and preventing further harm to the strands.

In contrast, improper shampooing techniques, use of expired products, and excessive exposure to sunlight may contribute to hair issues but are more indirect causes or situational rather than common causes of damage post-chemical treatment.