What should you know about sun allergy products?

A sun-triggered eruption may reflect polymorphic light eruption, contact dermatitis from a product, or photosensitivity linked to a medicine. A new sunscreen or fragrance can therefore confuse the picture. Choose a broad-spectrum sunscreen that feels comfortable, apply it to exposed areas as directed, and test a small area first if your skin reacts easily. Stop a product that causes burning, swelling, or a new rash. The [Sun Sensitivity](/symptoms/sun-sensitivity/) page explains the symptom pattern.

Use shade, a wide-brimmed hat, tightly woven clothing, and sunglasses alongside sunscreen. Keep the routine simple during a flare: a gentle cleanser, lukewarm water, and a bland moisturiser can reduce extra irritation. Avoid scrubs, strong fragrances, and unfamiliar active ingredients on inflamed skin. If a dermatologist recommends treatment, [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) may be used for a defined area and limited course. Recurrent seasonal episodes may be assessed for [Narrowband UVB Phototherapy](/treatments/medical-dermatology/narrowband-uvb-phototherapy/).

Book an assessment when the rash spreads, lasts beyond the expected flare, becomes painful, forms blisters, or returns whenever you are outdoors. Get urgent help for swelling of the lips or face, breathing difficulty, dizziness, or a rapidly developing reaction. Bring the product containers and a list of medicines to the appointment.

Ask whether the product ingredients could be contributing, which sunscreen texture suits your skin, how to protect skin during a flare, and whether testing is needed to distinguish allergy from photosensitivity.