Start with a small routine

Use a gentle cleanser only where needed, a fragrance-free moisturizer, and sun protection. Avoid changing cleanser, serum, moisturizer, and sunscreen in the same week; too many variables make a reaction hard to trace.

Fragrance-free is the clearer label

AAD guidance notes that “unscented” products can still contain fragrance used to mask odor. Choose “fragrance-free” when fragrance is a known or suspected trigger, while remembering that any ingredient can still cause an individual reaction.

Test before full-face use

AAD's home-use method applies a product to a small area twice daily for seven to ten days, following the normal directions. A dermatologist's diagnostic patch test is different and may be needed when rashes keep returning.

Know normal uncertainty versus a reaction

A new product does not need to sting to work. Persistent burning, a red itchy rash, swelling, blistering, or worsening discomfort is a reason to stop rather than push through.

Keep sun protection practical

Choose a broad-spectrum, water-resistant sunscreen with SPF 30 or higher that you can apply as directed. If one formula stings, stop and try a different suitable format after the skin settles.

Sources

• How to test skin care products — Describes a small-area home-use test twice daily for seven to ten days and advises stopping and washing off a product when a reaction develops.
• Dermatologists' top tips for relieving dry skin — Recommends short warm showers, gentle fragrance-free cleansing, moisturizer on damp skin, and cream or ointment for marked dryness.
• How to decode a sunscreen label — Recommends broad-spectrum, water-resistant SPF 30 or higher and reapplication every two hours outdoors and after water, sweat, or toweling.