If your child's symptoms improve after using the bronchodilator, your child may have asthma. If your child's healthcare professional suspects asthma, your child may be prescribed a bronchodilator - a drug that opens the airways. It can be especially difficult to diagnose asthma in young children because there are many conditions that cause asthma-like symptoms in this age group. Instead, diagnosis is generally based on a child's symptoms, medical history and physical examination. Lung tests in children under age 5 are not typically done. But if your measurements have fallen significantly, it's possible you do. If your spirometry measurements remain typical, you probably don't have asthma. If you appear to have asthma triggered by exercise, called exercise-induced asthma, you may be asked to do physical activity to see whether it triggers symptoms.Īfter either action, you'll retake the spirometry test. This is done by having you breathe in a substance that causes the airways to narrow in people with asthma, such as methacholine (meth-uh-KO-leen). If your spirometer results are typical or near typical, your healthcare professional might try to trigger asthma symptoms. Showing significant improvement after taking the medicine could mean you have asthma. After taking lung test measurements, you may be asked to inhale an asthma drug to open air passages and then do the test again.
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