Photosensitive Dermatitis

Photosensitive dermatitis is abnormal cutaneous reaction to UV/visible light (polymorphous light eruption/photoallergic/phototoxic/actinic prurigo/chronic actinic dermatitis), presenting with pruritic eczematous papules/plaques on exposed skin after sun exposure. Treatment: strict sun protection (broad-spectrum SPF 50+, UVA/UVB protective clothing, hats); gradual sun exposure/hardening; topical corticosteroids; oral antihistamines; identify/avoid photoallergens (drugs/topicals/perfumes); phototherapy desensitization (NB-UVB/PUVA) for PMLE; systemic steroids for severe; azathioprine/cyclosporine for chronic actinic dermatitis; follow-up dermatology/photobiology.

Common Symptoms

Pruritic eczematous papules/plaques; exposed skin; after sun exposure

Causes and Pathogenesis

Immune/phototoxic reaction to UV causes eczematous dermatitis on exposed skin.

Treatment

Sun protection; topical steroids; antihistamines; identify photoallergens; phototherapy

Preventive Measures

Sun protection; gradual exposure; avoid photoallergens.

Department to Visit

It is recommended to visit the Dermatology/Allergy department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.