Polymorphous Light Eruption — Conditions

What is Polymorphous Light Eruption?

A photosensitivity condition where papules, vesicles, and erythema appear after spring or early summer sun exposure

Recurs seasonally and is a delayed-type hypersensitivity reaction to UV. Gradual sun exposure may build tolerance.

Main causes & characteristics

Polymorphous light eruption (PMLE) is known as a delayed hypersensitivity reaction to sudden UV exposure in spring and early summer. Skin that has had limited sun exposure during winter may develop papules, vesicles, and erythema upon encountering intense UV radiation. A tendency to recur each year during the same season is noted, though gradual exposure is known to induce tolerance over time.

How to manage

Starting from early spring, gradually increasing sun exposure and consistently applying sunscreen is recommended. Cooling and soothing exposed areas and moisturizing may help. Avoiding intense midday sunlight is advisable. If symptoms recur severely each year, consulting a dermatologist is recommended to explore management options such as light desensitization therapy.

Good to know alongside

PMLE is frequently discussed alongside photoallergy, photosensitivity reactions, and solar urticaria, and is recognized as a photosensitive condition that recurs seasonally.

Everyday care tips

Applying sunscreen before the first outdoor exposure of spring, and gradually increasing the duration of sun exposure to help the skin adapt to light, is advisable.

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Frequently Asked Questions (FAQ)

What is Polymorphous Light Eruption?

A photosensitivity condition where papules, vesicles, and erythema appear after spring or early summer sun exposure. Recurs seasonally and is a delayed-type hypersensitivity reaction to UV. Gradual sun exposure may build tolerance.

Related Entries

• Acne
• Atopic Dermatitis
• Rosacea
• Melasma
• Eczema
• Psoriasis
• Urticaria (Hives)
• Sunburn

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Sources & References

• Korean Dermatological Association
• American Academy of Dermatology — Diseases & Conditions
• DermNet (New Zealand Dermatological Society)
• NIH MedlinePlus — Skin Conditions

Medical Disclaimer

SKINROUTE is not a medical device or healthcare provider. All content is general skincare information for reference only. If you have concerns about your skin, please consult a board-certified dermatologist.