The Burden of Air Pollution on Skin Health: a Brief Report and Call to Action

Dermatology and Therapy
Open Access

Clinical Summary

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What was studied

EPA carbon monoxide (CO) levels in Boston (May–July 2023) and Mass General Brigham dermatology clinic visits for atopic dermatitis, dermatitis, and eczema (May–September 2023) were compared with the same months in 2019–2022, about 300 miles downwind of the Quebec wildfires.

Key findings

CO rose from an average 0.22 ppm (May–September 2019–2022) to 0.6 ppm in July 2023, coinciding with a spike in AD/dermatitis/eczema clinic visits. PM2.5 also increased to 41 μg/m3 in July 2023 versus 6.6 μg/m3 during the prior year.

Study limitations

EPA data were limited by sensor coverage and reporting lag (CO available only through July 2023), and did not include other pollutants (e.g., aromatic hydrocarbons, lead). Diagnostic overlap among AD, irritant, and allergic contact dermatitis and the absence of patient-level data may have led to misclassification.

Clinical implications

During wildfire-driven air pollution spikes, clinicians should anticipate more AD/dermatitis flares and counsel vulnerable patients on exposure reduction (e.g., staying indoors, N95s, and indoor air filtration) per public health guidance.