What commonly causes allergic reactions in skin care products?

Fragrance is commonly recognized as a significant cause of allergic reactions in skin care products. Many personal care products contain synthetic or natural fragrances, which can trigger sensitive skin reactions in a large percentage of the population. These reactions can manifest as rashes, itching, or hives. Fragrance ingredients are often complex mixtures that can include hundreds of individual components, making it challenging to identify the specific allergen.

Understanding this aspect is crucial for estheticians, as they need to choose products based on their clients' skin sensitivities. While preservatives, alcohol, and essential oils can also cause some individuals to have reactions, fragrance is particularly noted for its prevalence as an allergen in cosmetics and skin care formulations. Being informed about these ingredients helps in recommending safer and more suitable options for clients with sensitive skin or known allergies.