Ambient air pollution is linked to various skin diseases, but evidence quality is low due to bias and study design variability.
2
Atopic dermatitis was the most studied condition, with both short- and long-term exposures increasing risk, especially from gaseous pollutants.
3
Psoriasis showed stronger short-term associations with gaseous pollutants and moderate certainty in long-term studies due to lower bias.
4
High risks of bias were common across studies, limiting confidence in findings and highlighting the need for better research methodologies.
5
The authors call for more longitudinal studies and research from low- to middle-income countries to better understand air pollution's impact on skin health.
