Massachusetts Board of Cosmetology Practice Exam

Fine hair is most susceptible to damage from heat styling due to its structure and texture. Unlike thick or coarse hair, which can withstand higher temperatures and retain more moisture, fine hair has a smaller diameter and often lacks the protective cuticle layer that shields it from damage. This makes fine hair more vulnerable to the drying effects of heat styling tools. When heat is applied, it can easily penetrate fine hair, leading to increased risk of breakage, frizz, and loss of natural shine. In contrast, thicker and coarser hair tends to have more elasticity and strength, allowing it to endure heat styling better. Curly hair, while it may also be sensitive to heat, often has a more resilient structure compared to fine hair, given its density and coil nature. Thus, heat styling can create specific challenges and requires extra care for fine hair to prevent damage.