Breathlessness and suspected asthma (children and young people)

This service provides breathing tests and support for children and young people who are experiencing symptoms such as breathlessness, wheezing, persistent cough or chest tightness.

The aim of the service is to help identify whether symptoms may be related to asthma and to support families in understanding and managing their child’s respiratory health.

This is a diagnostic service so tests will be carried out on the day. Please allow 60-90 minutes for appointments.

What is involved in the test?

FeNO is a simple test where your child blows slowly into a machine. It measures nitric oxide in the breath, which can indicate inflammation in the airways, often seen in asthma.

Spirometry measures how much air your child can breathe in and out and how quickly they can blow air from their lungs. This helps the nurse assess lung function and breathing problems.

Preparing for the test

To help ensure accurate results:

Your child may be asked to avoid using certain inhalers before the appointment
Avoid caffeine (such as cola, tea, coffee, or energy drinks) before the test
Avoid foods high in nitrates, such as beetroot or spinach, before FeNO testing
Avoid strenuous excercise before the appointment
Avoid large meals immediately before the test
Wear comfortable clothing.

If your child needs their inhaler for symptoms before the appointment, please use it as needed and inform the clinic.

What happens at the appointment?

At the appointment, a children's respiratory nurse specialist will talk with you about your child’s symptoms, medical history and any current medication.

Your child may be asked to complete breathing tests to assess how their lungs are working. These may include:

FeNO testing – measures inflammation in the airways
Spirometry with bronchodilator reversibility – lung function is tested before and after using a reliever inhaler to see if breathing improves.

The tests are safe, non-invasive and don't take too long to complete , although they may need to be repeated to ensure accurate results.

After the tests, the nurse specialist will discuss the results and next steps with you.

If asthma is diagnosed, your child may receive: