Minnesota Cosmetology State Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Brittleness and breakage are common signs of over-processing in hair, which typically results from excessive chemical treatments, heat styling, or improper hair care. When hair is over-processed, its cuticle layers can become damaged and compromised, leading to a weakened structure. This results in hair that feels dry and brittle, making it more prone to breakage.

In contrast, an oily scalp usually indicates a buildup of sebum and is not associated with the structural changes that occur with over-processing. Excess volume may be due to several factors, such as hair texture or styling methods, and doesn’t necessarily indicate damage. Healthy shine is indicative of well-maintained hair with a strong cuticle that reflects light, which is the opposite of what occurs with over-processing. Thus, brittleness and breakage are clear indicators that hair has been subjected to too many harsh treatments or styling practices.