Lung rehabilitation
Airway clearance for bronchiectasis
In bronchiectasis the airways are widened and prone to collecting mucus, which can lead to repeated chest infections. Regular airway clearance is therefore the daily foundation of treatment. This guide explains the techniques physiotherapists teach, how often people usually do them and what supports them, based on NHS and Asthma + Lung UK information.
Last checked: 2026-10-03
Key facts
At a glance.
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Daily routine
The NHS says you will usually need to do clearance exercises every day to control cough and reduce chest infection risk.
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Frequency
Asthma + Lung UK says most people benefit from airway clearance twice a day for 10 to 30 minutes, depending on the condition.
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Taught by a physio
A specialist respiratory physiotherapist teaches suitable techniques and monitors progress.
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Nebulised saline
Where phlegm is hard to clear, saline may be used about 10 minutes before clearance.
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Antibiotic rescue pack
The NHS says some people keep antibiotics at home for chest infection symptoms.
Why clearing mucus matters
The NHS says a specialist physiotherapist will teach you breathing techniques for clearing phlegm from the lungs and airways, and that you will usually need to do these exercises every day. This helps to control your cough and reduce the risk of chest infections.
Asthma + Lung UK says benefits of airway clearance include reduced breathlessness, fewer flare-ups and lower infection risk. It is used in bronchiectasis, COPD with phlegm and cystic fibrosis.
The active cycle of breathing technique
The active cycle of breathing technique, or ACBT, is a three-stage method of relaxed breathing control, deep breathing and huffing, according to Asthma + Lung UK. Between stages you rest with relaxed breathing so that you do not tire or wheeze.
Asthma + Lung UK explains that a huff is a big breath out through an open mouth instead of a forceful cough. A long huff follows a small-to-medium breath in and a slow squeeze out, like misting up a mirror, whereas a short huff follows a big deep breath in through the nose and a quick breath out.
Positions and devices
Asthma + Lung UK describes postural drainage as using changes of position to help phlegm move. Your physiotherapist will check that positions are safe for you, particularly if you have reflux or heart problems.
Hand-held oscillating positive expiratory pressure devices, such as Aerobika, Acapella and Flutter, use a combination of vibrations and air pressure to move phlegm higher up the airways. The NHS also mentions a hand-held vibration device. A physiotherapist chooses and adjusts the device and shows you how to clean it.
Making clearance work in practice
Asthma + Lung UK says most people benefit from airway clearance twice a day for 10 to 30 minutes, though this depends on the lung condition, and that more frequent sessions are needed during flare-ups. It suggests staying hydrated to thin phlegm and waiting an hour after eating.
The NHS says if phlegm is difficult to cough up, the care team may recommend a nebuliser with a salt solution before the exercises, and Asthma + Lung UK says to use nebulised saline around 10 minutes beforehand. Mucolytic medicines, including carbocisteine, may also be prescribed.
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Pick consistent times, such as on waking and in the evening.
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Use any prescribed bronchodilator first if you were told to.
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Keep a note of how much phlegm you bring up and its colour.
Exercise as part of clearance
Asthma + Lung UK says regular physical activity can help manage symptoms like breathlessness and can help clear phlegm from the lungs, and it points to its Keep Active programme and to pulmonary rehabilitation courses.
Pulmonary rehabilitation, described as an education and activity course offering physical and emotional support, is part of bronchiectasis treatment. Many people combine a daily clearance routine with brisk walking or other aerobic activity.
Flare-ups, antibiotics and self-management plans
The NHS says patients may be given antibiotics to keep at home as a rescue pack for chest infection symptoms and that if you have more than 3 chest infections a year a specialist may recommend long-term antibiotics. Asthma + Lung UK says a flare-up from bacterial infection is typically treated with antibiotics for 14 days, preferably after a sputum test, and that prophylactic antibiotics may be considered after two or more flare-ups in a year.
A written self-management plan sets out symptoms, treatments and flare-up steps, and Asthma + Lung UK says it helps you recognise early symptoms and treat them quickly.
When to seek urgent help
The NHS advises getting urgent help if your cough is very bad or quickly gets worse, or if you have symptoms of a chest infection such as a high temperature. Asthma + Lung UK advises contacting your healthcare provider for worsening symptoms, blood in sputum or persistent discomfort. Call 999 for severe breathlessness or coughing up a lot of blood.
Frequently asked
Questions people ask.
Quick, plain-English answers to the questions we hear most.
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How often should I do airway clearance?
Asthma + Lung UK says most people benefit from twice a day for 10 to 30 minutes, with more during flare-ups. The NHS says you will usually do it daily.
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What is ACBT?
Asthma + Lung UK describes it as relaxed breathing control, deep breathing and huffing, repeated in a cycle.
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What is a huff?
A big breath out through an open mouth rather than a forceful cough, according to Asthma + Lung UK.
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Do I need a device?
Not always. Asthma + Lung UK lists OPEP devices such as Aerobika, Acapella and Flutter as options your physiotherapist may choose.
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Does nebulised saline help?
The NHS says a nebulised salt solution may be recommended when phlegm is hard to cough up, used before clearance.
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Can I do it straight after a meal?
Asthma + Lung UK suggests waiting an hour after eating.
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What is a rescue pack?
The NHS says it is a supply of antibiotics kept at home to use when chest infection symptoms start, as agreed with your care team.
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When are long-term antibiotics considered?
The NHS mentions more than 3 chest infections a year, and Asthma + Lung UK mentions two or more flare-ups in the last year.
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Can surgery treat bronchiectasis?
Asthma + Lung UK says it is rarely used, with lobectomy for affected lobes helping only a small number of people.
Where this comes from
Sources and checking.
This guide is for information, not medical advice.
Your GP or consultant knows your history and can tell you which parts apply to you. If your symptoms are severe, rapidly worsening, or come with red-flag features, seek urgent medical care. Figures and availability change, so treat them as a guide and confirm with the provider.
Published 2026-10-03, next review 2027-10-03.
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Asthma + Lung UK: Airway clearance when you have a lung condition (https://www.asthmaandlung.org.uk/living-with/airway-clearance-when-you-have-lung-condition), retrieved October 2026
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Asthma + Lung UK: How is bronchiectasis treated (https://www.asthmaandlung.org.uk/conditions/bronchiectasis/how-bronchiectasis-treated), retrieved October 2026
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Asthma + Lung UK: Self-management for bronchiectasis (https://www.asthmaandlung.org.uk/conditions/bronchiectasis/self-management-bronchiectasis), retrieved October 2026
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NHS: Bronchiectasis (https://www.nhs.uk/conditions/bronchiectasis/), retrieved October 2026
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