Bronchiectasis is a chest disease. The airways in the lungs have become damaged and scarred. Once a person has bronchiectasis, they usually have it for life. Good treatment stops it getting worse and in very young children, can reverse some of the disease.

Illustration by Dr Greta File. Property of KidsHealth.

Image showing a child with cross-section of the lungs with normal airways and with widened airways


Key points about bronchiectasis

  • bronchiectasis (Bx) is a chest disease - the airways in the lungs have become damaged and scarred
  • mucus gets trapped in pockets in the airway - this causes infections
  • the main symptoms of Bx are a wet sounding cough that lasts for weeks or happens often, and repeated chest infections
  • once your child has Bx, they usually have it for life
  • early recognition and treatment can improve the scarring
  • good care can help your child to stay well with Bx

What is bronchiectasis?

You can't catch Bx or give Bx to anyone.

Bronchiectasis (Bx) is a chest disease - the airways in the lungs have become damaged and scarred.

The airways (or breathing tubes) become widened and mucus gets trapped in pockets within the airway. Having extra mucus in the airways means bacteria and viruses can grow quickly and cause infections.

These infections cause damage and more scarring to the airways and lungs. Once this has happened, the scarring is usually lifelong. But, with good treatment, there can be some improvement and further damage prevented. Good treatment is especially important in young children because their lungs are still growing.

Watch a video featuring former Warriors rugby league player Wairangi Koopu. It focuses on recognising the signs of infection that can lead to bronchiectasis, and acting on them. (Ministry of Health and Health TV video).

Bx is different from asthma but some children with Bx have asthma as well.

What causes bronchiectasis?

Common causes

Most children get Bx after having a very bad chest infection or repeated chest infections. Bx usually develops after a child has had:

  • severe bronchiolitis or pneumonia needing a hospital stay
  • chest infections needing repeated antibiotic treatment at home
  • a wet sounding cough lasting for weeks or happening frequently

Less common causes

Problems with fighting off infection. Some children cannot fight infection very well because they are born with a problem in their infection-fighting (immune) system.

Medicines. Some medicines (such as oral steroids) cause difficulty in fighting off infection.

Objects stuck in the airway. If a child breathes in a nut or a piece of a toy and this gets stuck in the airway, it can cause a blockage that can lead to scarring.

Food or liquid going into the lungs (aspiration). Children who sometimes cough or choke when feeding have problems controlling their swallow. Food can end up in their lungs. This can also happen if food refluxes from the stomach and ends up going into the lungs. Over time this can cause Bx.

Primary ciliary dyskinesia. In this condition, the tiny mucus-clearing hairs (cilia) in the lungs are not working properly.

How long does bronchiectasis last?

Once a person has Bx, they usually have it for life. Good treatment stops it getting worse and in very young children, can reverse some of the disease.

How common is bronchiectasis in New Zealand?

  • 1 in 3,000 children gets Bx
  • there is 1 new case of Bx in a New Zealand child every week

What are the signs and symptoms of bronchiectasis?

Children with Bx feel well most of the time.

Wet-sounding cough

A wet-sounding cough is the main symptom and usually lasts for weeks. Extra mucus (phlegm or sputum) in the airways causes the cough and your child may spit or cough up some of this mucus. 

This cough can get worse during infections, first thing in the morning and during exercise. Remember though that exercise and playing sport is helpful for keeping well.

When should I seek help for my child with bronchiectasis?

When children with Bx become unwell, they cough more and the mucus can change colour from clear to yellow or dark green. The mucus can sometimes be smelly. They may lose their appetite and feel tired.

When to see a doctor

If your child has Bx, take them to see your family doctor when they:

  • have a bad cold with a runny green nose
  • are coughing more than normal
  • have a cough that is wetter than usual
  • have more mucus which is darker, thicker or smelly
  • are breathing faster than normal
  • have a fever
  • have pain in their chest
  • are tired and not eating or drinking as well as normal
  • are unable to take part in sport and exercise

When to see a doctor urgently

Your child is very sick and needs to see a doctor urgently if they:

  • get suddenly more unwell
  • cough up blood

When to dial 111

Dial 111 within New Zealand (use the appropriate emergency number in other countries) for urgent medical help if your child:

  • is having difficulty talking because they are so short of breath
  • has blue lips or tongue
  • is coughing up a large amount of blood

What tests might my child with bronchiectasis need?

Chest x-ray

A chest x-ray is usually the first investigation but does not always show Bx damage very well. Your child will probably also need a chest CT scan.

CT scan

Chest CT scans show Bx damage well. This chest CT scan shows Bx damage in one lung.

Chest CT scan showing Bx in one lung

Sputum culture

Your health professional will collect some mucus from your child. Many children will be able to cough some mucus into a jar. Sometimes, a physiotherapist might need to help your child collect a mucus sample.

The mucus is tested for bacteria or viruses. If your child's mucus has bacteria, your doctor will give them the right antibiotic to treat the infection.

Blood tests

Your child will have some blood tests to show that they are able to fight off infection.

Lung function test

Your child will breathe into a machine to measure how their lungs are working. It usually takes about 15 minutes.


A doctor can use a special telescope (bronchoscope) to look into the lungs to see the condition of the airways and take a sample of mucus. This test happens under a general anaesthetic. See some information about anaesthetics

Other tests

Sometimes your child may need other tests such as a sweat test (to look for cystic fibrosis).

What is the treatment for bronchiectasis?

1. Chest physiotherapy

Your child will need chest physiotherapy once or twice a day. There are different ways to do chest physiotherapy - either with breathing and percussion or by using a physiotherapy breathing device (PEP, acapella, bubble). This is to clear the extra mucus from your child's lungs to keep your child well. The physiotherapist will show you the best method to use with your child. The type of chest physiotherapy changes with age.

2. Exercise and sport

Exercise will help your child - it doesn't matter if they cough.

Exercise or playing sport 3 to 4 times a week is helpful to clear the mucus and to develop your child's lungs. Any type of exercise is good, especially if it makes your child take deep breaths. It doesn't matter if your child coughs during exercise.

3. Antibiotics

Your child will need antibiotics if they start to get sick or if they are coughing more. Children with Bx need a longer course of antibiotics (10 to 14 days). Most often, you can give your child antibiotics at home. Sometimes, if your child is very unwell, they may need antibiotics in hospital.

4. Asthma treatment

Some children with Bx may benefit from inhalers because they also have asthma.

5. Bx action plan

Children and young people with Bx can have an action plan. You and your doctor or another member of your child's healthcare team can discuss this so that it's right for your child. It lists your child's daily treatment and steps to take if your child becomes unwell.

Check this sample action plan (PDF, 234KB).

Bronchiectasis action plan

How can I keep my child with bronchiectasis well?

  • regular physiotherapy to keep your child's lungs clear of mucus
  • regular exercise and sport
  • a healthy balanced diet
  • keeping your child away from any cigarette smoke
  • make sure your child gets a flu vaccine every year
  • keeping up with hospital clinic appointments and reviews with your family doctor

If you want to give up smoking, call Quitline 0800 778 778. See the Quit/Me Mutu website, or talk to your family doctor.

What health appointments will my child with bronchiectasis need?

Outpatient clinics

Your child will have regular reviews with the hospital team. The team can include lots of different health professionals. How often the reviews happen depends on how well your child is.

The review will include:

  • height and weight measurement to check growth
  • lung function test to measure how well your child's lungs are working
  • a mucus sample to test for bacteria so your child can get the right antibiotics
  • a cough suction if your child is young and can't cough up mucus
  • a check on how you're going with physiotherapy techniques and whether they need changing

A stay in hospital

If your child has a chest infection that is severe or continues for a long time, they may need to go to hospital for 10 to 14 days to have specialist treatment.

Antibiotics. Your child will have these directly into a vein through a 'drip'. Sometimes your child will have a special drip called a 'PICC line'. This is a long tube which lasts for longer than a 'drip' - it doesn't need replacing regularly.

Chest physiotherapy. A professional physiotherapist will do this twice a day.

Sometimes, your child will have extra testing just like they do at outpatients appointments such as:

  • lung function testing
  • mucus sampling
  • chest x-ray

Where can I go for support and more information about bronchiectasis?

You can check The New Zealand Bronchiectasis Foundation website for:


Starship Foundation and the Paediatric Society of New Zealand acknowledge the cooperation of the Starship Respiratory Service at Starship Children's Health and the Paediatric Department, University of Auckland in making this content available to patients and families.

This page last reviewed 14 February 2021.

Call Healthline on 0800 611 116 any time of the day or night for free health advice when you need it