Illinois Cosmetology Instructor Practice Exam 2026 - Free Cosmetology Instructor Practice Questions and Study Guide

Chemical perming is a process that involves the use of chemicals to break and reform the bonds in the hair structure, allowing the stylist to create curls or waves that are intended to be long-lasting. This alteration of the hair's molecular structure is what enables the styling to last beyond a single shampoo.

One of the significant side effects of chemical perming is that it can lead to hair damage. The chemicals used in perming, such as ammonium thioglycolate or glyceryl monothioglycolate, can weaken the hair fibers, especially if the hair is already prone to damage or has been subjected to multiple chemical processes in the past. As a result, the hair may become dry, brittle, or more prone to split ends following the treatment. Understanding this risk is crucial for both stylists and clients to ensure proper care and suitable hair health before and after the process.