Do topical corticosteroids treat photodermatitis?

Photodermatitis is an inflammatory reaction that appears after light exposure, sometimes because a medicine, skincare product, plant, or another substance makes the skin more light-sensitive. Redness, itching, burning, bumps, or blisters can develop on exposed areas and may leave temporary colour changes. A corticosteroid can reduce the skin's inflammatory response during a flare, but it does not identify or remove the trigger. The pattern and timing of the rash help a clinician decide whether further evaluation is needed.

Use the prescribed corticosteroid only as directed and reduce direct light exposure while the skin is active. Wear protective clothing and a broad-brimmed hat, seek shade, and discuss sunscreen choice with a clinician if products themselves may be involved. Review new medicines, fragrances, plant contact, and skincare products with your doctor; do not stop a prescribed medicine without medical advice. Keep the skin moisturised, avoid scratching, and do not apply steroid to the eyes or broken skin unless instructed.

Arrange a medical review if the rash keeps returning, appears on covered skin, forms blisters or open areas, spreads despite light avoidance, or follows a new medicine. Seek urgent help for extensive blistering, severe skin pain, fever, facial swelling with breathing difficulty, or eye involvement with vision changes.

Ask whether the pattern suggests a light reaction, which product and body sites the corticosteroid is suitable for, and how long to use it. Ask whether a medicine, plant, or skincare ingredient could be contributing and what protection is practical for your daily routine.