question: Asthma - children (Exams and Tests): The health care provider will use a stethoscope to listen to the child's lungs. The provider may be able to hear asthma sounds. However, lung sounds are often normal when the child is not having an asthma episode.     The provider will have the child breathe into a device called a peak flow meter. Peak flow meters can tell how well the child can blow air out of the lungs. If the airways are narrow due to asthma, peak flow values drop.   You and your child will learn to measure peak flow at home.   Tests may include:     - Allergy testing on the skin, or a blood test to see if your child is allergic to certain substances   - Chest x-ray   - Lung function tests