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Psoriasis: the types, the scores and the winter

Psoriasis: the types, the scores and the winter: this guide covers plaque, scalp, guttate after a throat infection, nail psoriasis, inverse, palmoplantar…

This guide is general education, not a diagnosis or an individual treatment plan. Urgent, severe or worsening symptoms belong with the local emergency service or a qualified clinician.

What this guide covers

This guide covers plaque, scalp, guttate after a throat infection, nail psoriasis, inverse, palmoplantar, psoriatic arthritis warning signs, plus what PASI and BSA mean when a dermatologist says them, the Koebner phenomenon, why northern latitudes flare in December and clear in July, what phototherapy actually is and what a home sunbed is not, the metabolic and cardiovascular comorbidity that matters more than the plaques, and an honest page on diet claims.

One focused section asks: "Scalp psoriasis or dandruff: how they differ and what to try". Referral thresholds and a "this is not a diagnosis" line on Every section.

How to use it

Start with the description that most closely matches your question about Psoriasis: the types, the scores and the winter. Use the evidence section to understand what is known, then use the boundary section to decide when self-education should stop and clinical care should begin.

The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.

Search vocabulary in four languages

Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.

Evidence and provenance

The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.

Source: WHO Global report on psoriasis 2016 (CC BY-NC-SA), EuroGuiDerm psoriasis guideline (JEADV, open access), PASI (Fredriksson & Pettersson 1978, published). · checked 2026-09-09

Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.

Scope and boundaries

/joints covers arthritis systemically; here psoriatic arthritis appears only as the skin-first warning signs that should send you there.

Connected TempoLife guides

The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.

Why it belongs on TempoLife

/skin, /sun, /winter, /joints, /inflammation.

Frequently asked questions