Polymorphic Light Eruption (PLE)
What Is Polymorphic Light Eruption (PLE)?
Polymorphic light eruption (PLE) is a common skin disorder that usually presents with a rash after exposure to ultraviolet (UV) light. PLE can be triggered by sunlight or artificial sources of UV light, such as from a tanning bed. It is an acquired reaction, meaning that it often takes multiple exposures to UV light before it develops. PLE is also known as sun allergy, photodermatitis, and actinic prurigo.
Symptoms of Polymorphic Light Eruption (PLE)
The most common symptom of PLE is a red rash on the areas of skin that were exposed to UV light. Along with the rash, people may experience itching, swelling, and sometimes painful or burning sensations. The rash typically appears hours after exposure and can persist for several days.
Risk Factors for Polymorphic Light Eruption (PLE)
PLE is most common in young and middle-aged adults with fair skin. People with certain genetic disorders, such as porphyria, may be at a higher risk of developing PLE. Additionally, chronic exposure to UV light, such as from habitual tanning, increases risk.
Diagnosis of Polymorphic Light Eruption (PLE)
PLE is typically diagnosed based on the appearance of the rash. Other skin conditions may need to be ruled out, such as contact dermatitis, to make sure that the rash is caused by PLE. To do this, a skin biopsy or patch test may be recommended.
Treatment of Polymorphic Light Eruption (PLE)
Most cases of PLE can be managed with sun protection, such as wearing protective clothing, avoiding sun exposure during peak hours, and using sunscreen. Oral antihistamines or topical steroids may be recommended for itching or burning sensations.
Ways to Reduce Risk of Developing Polymorphic Light Eruption (PLE)
- Use sunscreen year-round, even on cloudy days.
- Avoid tanning beds.
- Limit sun exposure during peak hours.
- Wear protective clothing when outdoors.
- Check medications for photosensitivity.