Solar Urticaria

Excerpt

Solar urticaria is a chronic acquired photosensitivity disorder characterized by recurrent urticarial eruptions on skin exposed to sunlight. Although typically benign, the condition can be severely disabling, limiting daily activities and markedly reducing quality of life. Diagnosis is primarily clinical, supported by phototesting to identify the action spectrum and minimal urticarial dose. Symptoms and distribution may mimic other acquired photodermatoses, including polymorphous light eruption, drug-induced photosensitivity, and photocontact dermatitis.