No abstract

Photosensitivity disorders are among the most common diseases in dermatology 1,2 . They are usually classified into the following subgroups: idiopathic, exogenous, photo-aggravated, metabolic, and genetic photodermatosis 3,4 . Phototesting is often required for the diagnosis of some idiopathic photodermatosis as polymorphous light eruption (PLE), solar urticaria, chronic actinic dermatitis, and hydroa vacciniforme and for the diagnosis of exogenous photodermatosis as photocontact dermatitis (PCD) and systemic photosensitization. It can also be useful when it is negative in the diagnosis of photoexacerbated atopic dermatitis. However, fewer and fewer