Health outcome · disease

Psoriasis

Part of: Skin diseases

A chronic immune-mediated skin disease with scaly, inflamed plaques. Emerging studies associate flares with air pollution — particulate matter and nitrogen dioxide — and with low indoor humidity, alongside the established triggers of stress, infection and smoking.

G-0060 · Updated 5 September 2026 · Coridum Research

Not reviewed by a clinician. This entry describes a disease or a symptom. We are introducing clinical review for pages of this kind; until that reviewer is in place, this page has been written and checked by the Coridum team but not reviewed by a clinician. It is general information and not medical advice. How this library is built is described in How we build this library.

Why it matters indoors

Unlike atopic dermatitis, psoriasis is driven by an overactive immune response rather than a barrier defect, but the skin is exposed to the same air. Recent cohort and registry studies report more flares and hospital visits on high-pollution days and in polluted regions; the evidence is newer and thinner than for eczema, and mechanisms (oxidative stress, inflammation) are inferred rather than demonstrated indoors.

Identifiers

MeSH
D011565

In the literature

  1. Types of psoriasis and their effects on the immune system (2022). Cureus. doi:10.7759/cureus.29536 CKB 0640
  2. Defining the relationship between daily exposure to particulate matter and hospital… (2022). doi:10.5021/ad.2022.34.1.40 CKB 0632
  3. The skin is no barrier to mixtures: Air pollutant mixtures and reported psoriasis or eczema in the Personalized Environment and Genes Study (PEGS) ✉ (2022). doi:10.1038/s41370-022-00502-0 CKB 0638

Studies in the Coridum Knowledge Base in which this term is used. The definition follows standard usage in WHO, ISO and textbook sources; it is not quoted from these papers.

CKB = document number in the Coridum Knowledge Base, our curated library of peer-reviewed studies. Follow the DOI for the original paper.