Which type of hair requires caution when using relaxers?

The correct answer indicates that curly or coarse hair requires caution when using relaxers due to its unique structure and resistance to chemical treatments. Curly and coarse hair types often have a thicker cuticle layer and a different internal structure, which can make them more susceptible to damage from chemical processes.

Relaxers work by breaking down the protein structure of the hair to alter its shape, leading to a straighter appearance. When applied to curly or coarse hair, there is a higher risk of over-processing, which can result in excessive dryness, breakage, or even irreversible damage. Additionally, the strength of the relaxer used must be carefully selected based on the hair's texture and condition to achieve the desired results without compromising the hair's integrity.

In contrast, while other hair types like straight, thin, or colored hair also require specific considerations when using relaxers, they may not be as inherently vulnerable to the same extent as curly or coarse hair. For example, fine or thin hair can become limp, and colored hair can potentially be more porous, but these issues are distinct from the considerations needed for curly or coarse hair. Proper consultation and professional knowledge are essential to ensure safe and effective use of relaxers on different hair types.