The cardinal symptom is severely pruritic skin lesions. macular, papular, papulovesicular, urticarial, multiforme- and plaque-like variants are differentiated morphologically, hence the name polymorphous. usually one morphology dominates in a single individual (monomorphous). the skin lesions develop a few hours to several days after sun exposure. initially, patchy erythema develops, accompanied by pruritus. distinct lesions then develop. the upper chest, upper arms, backs of the hands, thighs, and the sides of the face are the primary localizations. the skin lesions resolve spontaneously within several days of ceasing sun exposure and do not leave behind any traces. [pmid:21442060]

Polymorphous light eruption (PLE) presents with itchy red small bumps on sun-exposed skin, particularly face, neck, forearms and legs. It generally appears 30 minutes to a few hours after sun exposure and may last between one and 14 days...