11/10/2026
Breathing in humid air activates nerves in your lungs that narrow and tighten your airways.
Humidity also makes the air stagnant enough to trap pollutants and allergens like pollen, dust, mould, dust mites, and smoke.
This can set off your asthma symptoms.
Dust mites live in furniture, carpets, and bedding.
They thrive at humidity levels of 70 -80%. Their remains and waste can also cause asthma symptoms to flare up.
You can’t control the weather, but you can reduce your exposure to humidity and avoid asthma symptoms in the process.
When it’s humid outside, (if possible) stay indoors with your windows closed and your air conditioning turned on.
If you are still having trouble controlling your asthma symptoms, even with medication, you probably need to review your asthma plan and make some changes.
You can do this by speaking with your GP or making an appointment with one of our friendly educators at AFNT by calling 1800 ASTHMA or (08) 8981 6066