The air we breathe contains lots of different particles that can trigger asthma symptoms. Air pollutants like cigarette smoke and car exhaust fumes release gases and particles into the atmosphere, which can irritate your airways.
- If you find pollution triggers your asthma, keep well informed about air quality.
- Ozone can be a problem for some people. Levels are likely to be higher on hot, summer days. If you think this might be a trigger for you, avoid exercising outdoors, especially in the afternoon.
There is no strong evidence that wearing a facemask is helpful.
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