This study looked at the effects of different seasons in patients with psoriasis.

Quote:

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Psoriasis is a chronic inflammatory skin condition driven by immune system dysfunction, genetic predisposition and environmental factors. Patients with psoriasis experience a well-known clinical phenomenon of ‘winter severity and summer relief’, in which seasonal environmental factors play critical roles in the onset and progression of psoriasis.

These factors include temperature, humidity, infection, light exposure and psychological stress. Seasonal changes in temperature and humidity can compromise skin barrier function and exacerbate inflammatory responses, thereby worsening psoriasis symptoms.

Notably, during the winter, decreased light exposure leads to reduced vitamin D (VD) levels, reaching their lowest levels from late winter to early spring. This decline in VD levels is associated with increased disease activity, greater disease severity and more frequent flare-ups in patients with psoriasis.

During the winter, influenza and Streptococcus pneumoniae infections are more prevalent, which can further exacerbate psoriasis symptoms. Moreover, the environmental conditions in winter can trigger or intensify feelings of depression, which may adversely affect psoriasis through the brain–skin axis. In this comprehensive review, we thoroughly examined the influence of seasonal environmental factors on the incidence, recurrence and severity of psoriasis.

By clarifying these complex relationships, we aimed to support the future development of more personalised and effective treatment and management strategies for patients with psoriasis.

Source: onlinelibrary.wiley.com

*Funding: National Natural Science Foundation of China

Not sure they needed to do much research on this, a simple survey could have given them the same results.

Personally, I'd rather see a study on "Does Vit D supplements help with psoriasis over summer months" or

Studies find psoriasis patients tend to have more flares when humidity levels reach "x" or even better:

New study shows "this treatment" aids psoriasis patients during summer months or during infection or when under stress.

Because there have probably been studies on Vit D, etc.... it's only when they start talking treatment that I really pay attention. Even then, I rarely understand it.

(Wed-19-03-2025, 13:30 PM)Kat Wrote: Not sure they needed to do much research on this, a simple survey could have given them the same results. 

Personally, I'd rather see a study on "Does Vit D supplements help with psoriasis over summer months" or

Studies find psoriasis patients tend to have more flares when humidity levels reach "x" or even better:

New study shows "this treatment" aids psoriasis patients during summer months or during infection or when under stress.

Because there have probably been studies on Vit D, etc.... it's only when they start talking treatment that I really pay attention.  Even then, I rarely understand it. 

Agree with you Kat.

I myself always take extra Vit D.

And yes, it goes up and down, often with stress levels.

(Wed-19-03-2025, 16:52 PM)Caroline Wrote:

(Wed-19-03-2025, 13:30 PM)Kat Wrote: Not sure they needed to do much research on this, a simple survey could have given them the same results. 

Personally, I'd rather see a study on "Does Vit D supplements help with psoriasis over summer months" or

Studies find psoriasis patients tend to have more flares when humidity levels reach "x" or even better:

New study shows "this treatment" aids psoriasis patients during summer months or during infection or when under stress.

Because there have probably been studies on Vit D, etc.... it's only when they start talking treatment that I really pay attention.  Even then, I rarely understand it. 

Agree with you Kat.

I myself always take extra Vit D.

And yes, it goes up and down, often with stress levels.

I take Vit D supplements as well. I do try to get outside more and it just makes sense that people naturally get out more in warmer weather.

I just drink milk (like Fred drinks wine) for my vitamin D.

(Thu-20-03-2025, 05:04 AM)mataribot Wrote: I just drink milk (like Fred drinks wine) for my vitamin D.