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Smoking and asthma

2
 min read · 
16 November 2025
Smoking and asthma
Smoking and second-hand smoke can worsen or prolong the symptoms of asthma.

Smoke increases the risk of developing an asthma attack. If you have asthma and smoke, it is best to make every effort to stop.

Smoking will likely mean you have more symptoms and need more medicines to keep on top of your asthma.

Babies and children are at greater risk from the toxins in smoke. This makes them more likely to develop chest infections and at higher risk of an asthma attack.

Passive smoking

Secondhand smoke is dangerous, especially for children, and can worsen asthma symptoms.

Babies and children are at greater risk from the toxins in smoke. This makes them more likely to develop chest infections and at higher risk of an asthma attack.

They will also be more likely to develop asthma later in life.

The smoke from cigars, pipes, hand-rolled cigarettes, and shisha can all trigger symptoms. Breathing secondhand smoke of all kinds increases risk. This can lead to the same health conditions as smokers.

If you have never smoked but have a spouse who smokes, your risk of lung cancer increases by about 25%.

Keeping a home smoke free

The only way to protect friends and family is to keep their environment smoke-free.

Tobacco smoke can stay in the room for up to two and a half hours. Pollutants stick to clothes and soft furnishings.

Smoking in only one room or opening doors and windows won’t help enough to make a difference. If you need to ask people to smoke outside, make sure they’re well away from the door. That way, smoke doesn't get blown back indoors.

Smoke from woodburning stoves, open fires and fireworks can also trigger symptoms.

Disclaimer

This article is for educational purposes only and should not be used as a substitute for medical advice. Always speak to your doctor, nurse or pharmacist about your individual care. The information reflects NHS and NICE guidance at the time of publication.

Last reviewed: 
November 2025
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