"Avoid fragrance if you have sensitive skin" is common, reasonable advice, and also more complicated in practice than the simple version suggests.
Why Fragrance Gets Singled Out
Fragrance, whether a single synthetic compound or a blend of many, is one of the most commonly reported triggers for skin reactions across sensitive skin generally. It's not that fragrance is inherently toxic or universally harmful. It's that fragrance compounds are frequent irritants for skin whose barrier is already compromised, which describes a lot of genuinely sensitive skin much of the time.
Why "Fragrance-Free" Labeling Can Be Misleading
Some products labeled "unscented" still contain masking fragrances, added specifically to cover the smell of other ingredients without creating a noticeable scent themselves. These can still trigger reactions in fragrance-sensitive skin, despite the product not smelling like anything. "Fragrance-free" is a more reliable claim than "unscented," though checking the actual ingredient list for terms like "parfum" or "fragrance" remains the most reliable check either way.
It's Not Universal
Not everyone with sensitive skin reacts to fragrance specifically. Some sensitive skin reacts more to other common irritants, certain preservatives, alcohol, specific active ingredients, with no particular issue from fragrance at all. Avoiding fragrance as a blanket precaution isn't unreasonable, but it isn't the only, or necessarily the most relevant, ingredient category to watch for every case of sensitive skin.
A More Useful Approach Than Blanket Avoidance
Rather than assuming fragrance avoidance alone solves reactivity, it's worth tracking whether your own reactions actually correlate with fragranced products specifically, or whether other ingredient categories are the more consistent pattern. For skin that does react specifically to fragrance, checking ingredient lists directly, rather than trusting front-of-package claims, remains the more reliable approach.