What should you know about Claritin for sun allergy?

Sun allergy is a general term for rashes that appear after ultraviolet exposure. Polymorphic light eruption may cause itchy bumps, patches, or blisters on exposed areas, often after stronger sunlight following a period with less exposure. Claritin contains loratadine and may lessen histamine-related itch, but the response varies and the medicine does not prevent ultraviolet-triggered inflammation.

A rash can also be related to a medicine, a skin product, heat, or another light-sensitive condition. [Sun Sensitivity](/symptoms/sun-sensitivity/) gives context for symptoms; a clinician can compare the timing, exposed areas, rash appearance, and any recent medicines.

Limit direct sun during the hours when exposure is strongest, seek shade, wear tightly woven protective clothing and a wide-brimmed hat, and use a broad-spectrum sunscreen that your skin tolerates. Follow the label or clinical advice for Claritin, and check other allergy products for overlapping ingredients. Cool compresses and a bland moisturiser may soothe irritation. A dermatologist may consider [Topical Corticosteroids](/treatments/medical-dermatology/topical-corticosteroids/) for an inflamed eruption or [Narrowband UVB Phototherapy](/treatments/medical-dermatology/narrowband-uvb-phototherapy/) in selected cases.

Seek urgent help for breathing difficulty, facial or throat swelling, faintness, widespread blistering, skin peeling, or involvement of the eyes or mouth. Arrange a review if the eruption recurs, spreads to covered skin, leaves bruising or pigment change, follows a new medicine, or fails to improve after avoiding sunlight. Record when exposure occurred and photograph the rash before it fades.

Ask whether the pattern fits polymorphic light eruption or another light-sensitive reaction, whether Claritin is suitable for the itch, and how to protect your skin without worsening irritation. Ask if any medicine or product could be increasing light sensitivity.