The Itch: Allergies, Asthma, Eczema & Immunology12 Feb

#144 - How Indoor Air Quality Impacts Allergic Disease (Part 1 of 2)

We spend about 90% of our time indoors. But what's actually in that air we breathe, and why does it matter so much for people with asthma, allergies, and eczema?

This is a two-part series about indoor air quality.

In the first part, we break down the three main categories of indoor air pollutants: particulate matter (PM2.5 and PM10), volatile organic compounds (VOCs), and biological allergens like dust mites and mold. Dr. G explains how each one affects the body differently and why people with allergic disease are especially vulnerable.

In part two, we discuss how you can improve your indoor air quality.

What we cover in part one about indoor air quality

What's actually in your indoor air: The three main categories are particulate matter (PM), VOCs, and biological allergens.
Why PM2.5 is more dangerous than PM10: PM2.5 is small enough to enter your lungs and bloodstream, while PM10 mostly irritates your nose and throat.
How we create particulate matter: PM2.5 comes from burning things like cooking, candles, and gas stoves. PM10 comes from dust, construction, and dirt tracked in on shoes.
The difference between particles and gases: PM2.5 is like tiny specks of dust or smoke. VOCs are invisible gases that cause smells, like that "new car" scent.
Indoor allergens: Dust mites, mold, pet dander, and cockroach allergens are biological triggers that can cause allergic reactions and worsen asthma.

More resources

This series is part of the EXHALE project, a set of six evidence-based strategies designed to help people with asthma achieve better health and improved quality of life. This series supports the last "E" in EXHALE by reducing asthma triggers in indoor environments.

This podcast is made in partnership with Allergy & Asthma Network

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