What sensitivity usually is — and what it is not
Most self-described sensitive skin is a barrier problem rather than an allergy. When the outermost layer is short on lipids or has been over-exfoliated, irritants and water pass through it far more easily than they should. The result is stinging from products that used to be fine, redness that flares with heat or wind, and a face that reacts to almost anything new. Rebuild the barrier and a surprising amount of that sensitivity fades.
True contact allergy is different: a reproducible, often delayed reaction to one specific ingredient, most commonly a fragrance component, a preservative, or a botanical extract. If you get the same reaction from the same product every single time, that is worth patch testing formally with a dermatologist rather than experimenting further at home.
Conditions like rosacea, eczema, and seborrheic dermatitis also present as sensitivity and need targeted care. Persistent central-face flushing with visible vessels, or scaly patches that keep returning in the same place, are worth a professional opinion. Nothing on this page is a substitute for that — but a gentle, minimal routine is the correct foundation in every one of those cases.
