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Polymorphic light eruption

Contents of this page:

Illustrations

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

Alternative Names    Return to top

Polymorphous light eruption

Definition    Return to top

Polymorphic light eruption is a common reaction to sunlight (ultraviolet light) that occurs in light-sensitive individuals.

Causes    Return to top

The cause is unknown. Some experts think it is a type of delayed allergic reaction.

Symptoms    Return to top

Small red pimples and blisters appear on the skin within 1 - 4 days after exposure to sunlight. The lesions may also appear as scaly skin.

Treatment    Return to top

Use sunscreen. Sun protection with broad spectrum sunblock that works against UVA rays is important.

Certain immunosuppressive pills may be used for more severe cases. Some people benefit from phototherapy in which the skin gets sensitized to the sun.

Update Date: 4/10/2009

Updated by: Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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