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Polymorphous light eruption

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Title: Polymorphous light eruption  
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Subject: ICD-10 Chapter XII: Diseases of the skin and subcutaneous tissue, List of cutaneous conditions, PMLE, Photodermatosis, PLE
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Polymorphous light eruption

Polymorphous light eruption
Classification and external resources
ICD-10 L56.4
ICD-9-CM 692.72
DiseasesDB 10327
MedlinePlus 001477
eMedicine derm/342

Polymorphous light eruption (PLE), or polymorphic light eruption (PMLE), is a skin condition caused by sunlight.


  • Classification 1
  • Signs and symptoms 2
  • Causes 3
  • Prognosis 4
  • Epidemiology 5
  • See also 6
  • References 7
  • External links 8


Two subtypes have been described:[1]

  • Juvenile spring eruption is a cutaneous condition that affected the helices of the ears, particularly in boys because their ears are relatively more exposed to sunlight.[1]
  • Benign summer light eruption is a cutaneous condition, and a name used in continental Europe, and particularly France, to describe a clinically short-lived, itchy, papular eruption particularly affecting young women after several hours of sunbathing at the beginning of summer or on sunny vacations.[1] After a person experiences this condition once, it will likely recur annually. Onset is generally in the teen years or 20s; the condition can then last the remainder of a person's life, with annual flare-ups after the first exposure to the sun each year.

Signs and symptoms

Symptoms include skin irritations, which may be itchy or painful, and are sometimes confused with hives. These irritations appear upon or shortly after exposure to sunlight,[2] and may last from 1 to 7 days. Lesions have been photographed showing fluid-filled blisters.

Secondary symptoms include flu-like symptoms; body aches, skin sensitivity, muscle aches, fever, dizziness, exhaustion, vision impairment, and disorientation.


The cause of PLE is not yet understood. It is thought to be due to a type IV delayed-type hypersensitivity to an allergen produced in the body following sunlight exposure.[3] It can be provoked by UVA or UVB rays. Some progression to autoimmune disease has been observed.[4]


Generally, PLE resolves without treatment; also, PLE irritations generally leave no scar. However, in severe cases the use of steroids is necessary to help reduce inflammation and increase quality of life of the patient. There are also other therapies for patients who are severely impacted, such as light therapy to harden the skin's surface.


The cases of this condition are most common between the spring and autumn months in the northern hemisphere.

Typically, 5-20% of fair skinned populations are affected, but it can occur in any skin type.[3] It is more common in females than in males. The condition can affect all ethnic groups and research suggests that 20% of patients have a family history of the complaint. Those suffering from PLE usually do so by age 30.

See also


  1. ^ a b c
  2. ^
  3. ^ a b
  4. ^

External links

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