What to use when you're allergic to sunscreen

Which sunscreen should you try?

Look for mineral filters only in the active ingredient list. A hybrid sunscreen contains mineral and chemical filters, so the presence of zinc oxide alone does not make the formula mineral only. Choose SPF 30 or higher, broad spectrum protection against UVA and UVB rays, and water resistance.45

The filter is not always the culprit: fragrance, preservatives and other ingredients can cause sunscreen allergy. A mineral formula can still contain an ingredient you react to. For allergy prone skin, avoid fragrance, parabens and oxybenzone; if testing has identified your allergen, avoid that substance in every formula.15

In the US, 'sensitive skin' has no FDA definition, so the phrase is not a reference letter for the bottle. Read the full ingredient list rather than choosing by those words alone.4

Is it an allergy or irritation?

Stinging or burning does not automatically mean allergy. Irritation directly damages the skin's outer layer; allergy involves an immune response. Both can cause contact dermatitis, an itchy, irritated skin reaction. If sunscreen stings or burns, try a fragrance free formula whose only active filters are zinc oxide and titanium dioxide.56

Some sunscreen allergies appear only after sunlight activates an ingredient. Tell a dermatologist if your rash follows sunscreen plus sun exposure. Patch testing helps identify an ingredient allergy, while photopatch testing checks reactions involving light. If several sunscreens cause trouble, testing can also investigate fragrance and preservatives. Bring the products you use, and ask a pharmacist to help match ingredient names to your avoidance list.137

How to try a replacement

1. 1Ask your doctor before testing another sunscreen at home, especially after a significant reaction. Use a product already cleared through your allergy testing when possible.
2. 2If your doctor agrees, apply a small amount to a small area such as the bend of your arm for several days, checking daily. Reactions can be delayed; observe the area for at least five days before wider use. A home trial cannot rule out irritation or replace professional testing.
3. 3Once you have a suitable sunscreen, apply it to skin not covered by clothing. Outdoors, reapply every two hours and after toweling off. Follow the label's 40 or 80 minute water resistance limit when swimming or sweating.

Tinted sunscreen can reduce the white residue left by some formulas, so sun protection does not have to come with a paint finish. Choose a tint that matches your skin tone, while keeping the same protection requirements and allergen checks.5

What should you use on the rash?

Rinse affected skin with warm water and an emollient, a moisturiser that helps prevent dryness. A pharmacist can suggest a suitable emollient; severe inflammation can need a prescribed steroid cream. Mild reactions often settle after stopping the product, but a photoallergic reaction can last up to three weeks. See a doctor for persistent, recurring or severe symptoms. Difficulty breathing, faintness or unsteadiness requires immediate emergency help.2367

What if no sunscreen suits you?

Use shade, long sleeves, trousers, a wide brimmed hat and sunglasses with UV protection. Avoid the sun between 11am and 3pm. With multiple confirmed sunscreen allergies, a specialist can advise relying on physical protection, including protective window film, rather than continuing to try creams that cause reactions.34