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    Polymorphic light eruption on the arm
   
Polymorphic light eruption on the arm

The cause of polymorphous light eruption is unknown. It usually appears 1 to 2 days following exposure to sunlight and may last up to one week. It is more common during adolescence and young adulthood, and occurs more frequently in females. It appears as recurrent redness (erythematous) and/or blistered patches (plaques). It may be an inherited disease in certain Native American groups.


Review Date: 5/13/2013
Reviewed By: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.
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