Does sunlight make psoriasis better or worse?

I have heard that sunlight can be helpful for psoriasis, yet the other day I heard someone I know say that it makes their's worse.

I got quite confused and couldn't understand if it makes it better, worse or does it depend? Can anyone explain to me please?

Authored By Rhodri Donoghue on Friday 2nd November 2012

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Yasmin Mahmoud
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Posted almost 8 years ago

In general sunlight makes psoriasis better, but for a minority it will make it worse. Koebner phenomenon applies if the patient gets sunburn only. It's basically new patches of psoriasis that form on damaged skin, like surgical scars.

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Iñigo de Noriega Echevarría
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Posted almost 8 years ago

According to Harrison´s Principles of Internal Medicine:

Ultraviolet light, natural or artificial, is an effective therapy for many patients with widespread psoriasis. Ultraviolet B (UV-B) light, narrowband UV-B, and ultraviolet A (UV-A) s

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Stephen Wilkinson
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Posted almost 8 years ago

Sunlight can help.

Sunburn can aggravate (Koebner phenomenon).

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bryony heasman
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Medical Student
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Posted almost 8 years ago

I think sunlight is generally said to improve psoriasis...

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Rumenge Alain
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Posted almost 8 years ago

I DO NOT KNOW REALLY

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