… and vitamins. Make sure they drink enough This keeps mucus thin and makes it easier to cough up. Let them cough whenever … You should get medical help straight away if: your child’s skin turns pale or blue or their lips and tongue are blue …

… need to have other tests too, such as spirometry and a peak flow test . How should I prepare? Smoking before the FeNO … children). Some devices will make a sound to help keep the flow at the right level throughout the test. You may have to …