
What Causes Polymorphic Light Eruption?

Polymorphic Light Eruption
Detailed Answer:
Hello and welcome to healthcaremagic
I am Dr. Kakkar. I have gone through uour query and I have understood it. I have also looked at the Images.
I would keep a possibility of Polymorphic Light eruption (PMLE), which can manifest as itchy papules and plaques on the sun exposed sites/uncovered skin like extensor arms, neck and face. It is a sun light induced eruption in people who have developed a sensitivity to sunlight (photosensitivity), in particular ultraviolet (UV) radiation from the sun.
The rash usually appears on areas of the body that tend to be covered during winters and exposed in summers: the upper chest, front of the neck and the arms and also face sometimes as red, tiny bumps or slightly raised patches of skin.
I would suggest her a broad spectrum sunscreen, that which offers both UV B as well as UV A protection throughout the day. A sunscreen with minimum spf 30 would be required.
It should be applied in the following quantity:
--3ml for face and neck(a little more than 1/2 teaspoon)
--3ml for each arm(a little more than 1/2 teaspoon).
A sunscreen should be applied every 2-3 hours.
For the blotchy rash, she could apply a moderately potent topical steroid e.g fluticasone propionate cream OR Mometasone furoate cream, twice daily over the affected area.
An OTC antihistamine e.g cetrizine 10mg once daily would help her symptomatically with the itch.
regards

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