What is a common contraindication for using chemical straighteners?

Chemical straighteners are designed to permanently alter the structure of the hair, making it straighter. However, one of the most crucial considerations before applying these chemical treatments is the existing condition of the hair. When hair has been previously relaxed or damaged, it may already be weakened. Applying a chemical straightener in such cases can exacerbate the damage, leading to breakage or excessive dryness.

In hair that has already been chemically treated, such as with relaxers, there is a high risk of over-processing. This can result in severely compromised hair that cannot withstand further chemical alteration without incurring significant damage. Therefore, identifying previously relaxed or damaged hair as a contraindication is essential for maintaining hair health and integrity.

In contrast, frizzy hair is often a reason some clients seek chemical straightening, and thick hair can usually handle these types of treatments given proper care. A dry scalp, while a potential concern, does not directly prevent the use of straighteners, but more attention to scalp care and condition would be warranted.