Damp, mould and asthma

Find out how damp and mould could make your asthma worse.

Why can damp and mould trigger asthma?

Living somewhere that is damp or mouldy is not good for your asthma. Babies, small children, older people, people with asthma, and people with allergies are more likely to be affected by damp and mould.

Mould is a type of fungus that grows in damp places. If you’ve got mould where you live, you’ll notice fuzzy black, white, or green patches on the walls, ceilings, or tiles.

Mould produces spores which can be breathed in. If you’re allergic to mould spores you might have symptoms like coughing, wheezing or sneezing. It could also trigger your asthma symptoms.

Damp and mould can increase your risk of other things that could make your asthma worse, like chest infections, colds and flu, and rhinitis (when your nose is irritated).

"If you’re having asthma symptoms or need your reliever inhaler three or more times a week, see your GP or asthma nurse. Whether it’s damp, mould, or something else making your asthma worse, they can help you get back in control of your symptoms." – Dr Andy Whittamore, Asthma + Lung UK’s in-house GP. 

Read more about damp and mould where you live.

How to manage damp and mould

  • Always keep your reliever inhaler (usually blue) with you, so you can use it for quick relief when you get symptoms.
  • Use a written asthma action plan, so that you know exactly what to do if your symptoms start. 
  • Manage your asthma well. This means taking your preventer medicines every day as prescribed, even if you feel well.
  • Speak to your GP or asthma nurse about antihistamines and nasal sprays to help you manage allergy symptoms. 
  • Shelter or Citizens Advice can give you advice and support about housing, especially if you live in a rented home.  

How can I manage damp and mould where I live?

If you think your home is damp, it’s important to act quickly to find out what’s causing the damp and deal with mould. 

Take a look at how to prevent condensation in your home.

Read more

Air pollution at home

Find out the common causes of air pollution at home, from the cleaning products you use, to the way you heat your home.

Improving indoor air quality

Use our handy checklist to find out the best ways to prevent indoor air pollution at home. You can also find out what to do if your symptoms are not improving.

Allergies at home

Find out about the different allergies you may have at home. From dust mites and cockroaches, to pets, damp, and mould.

Get support

Call our Helpline for support with your condition. Get advice on your medicines, symptoms or travelling with a lung condition, or just call us to say hello.

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We use your comments to improve our information. We cannot reply to comments left on this form. If you have health concerns or need clinical advice, call our helpline on 0300 222 5800 between 9am and 5pm on a weekday or email them.

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