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Polymorphic light eruption

Definition

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

Alternative Names

Polymorphous light eruption

Causes, incidence, and risk factors

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

Symptoms

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

Medium to strong steroid creams or ointments may be prescribed by your doctor. They are used 2 or 3 times a day helps clear the rash. Steroid pills may be used for more severe cases.

Some people benefit from phototherapy. Phototherapy is a medical treatment in which your skin is carefully exposed to ultraviolet light. This may help your skin become sensitized to the sun.

Expectations (prognosis)

In many patients, the chances of having this condition after being in sunlight decreases over time.

Prevention

  • Use sunscreen. Sun protection with broad spectrum sunblock that works against UVA rays is important.
  • Avoid sun exposure during hours of peak sun ray intensity.
  • Apply generous amounts of sunscreen with a sun protection factor (SPF) of at least 30. Pay special attention to your face, nose, ears, and shoulders. The higher the SPF, the greater the protection.
  • Apply sunscreen 30 minutes prior to sun exposure to allow penetration. Re-apply after swimming and every 2 hours while you are outdoors.
  • Wear sun hats. There is also SPF clothing and swimwear available.
  • Wear sunglasses with UV protection.
  • Use a lip balm with sunscreen.

References

Lebwohl MG, Heymann WR, Berth-Jones J, Coulson I, eds. Treatment of Skin Disease: Comprehensive Therapeutic Strategies. 3rd ed. Philadelphia, Pa: Saunders Elsevier; 2009.


Review Date: 5/13/2011
Reviewed 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.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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