There is currently no precise test with the diagnosis typically based on the pattern of symptoms and response to therapy over time. A diagnosis of asthma should be suspected if there is a history of: recurrent wheezing, coughing or difficulty breathing and these symptoms occur or worsen due to exercise, viral infections, allergens or air pollution. Spirometry is then used to confirm the diagnosis. In <answer>children under the age of six</answer> the diagnosis is more difficult as they are too young for spirometry.
What age is too young to use spirometry to determine asthma?
children under the age of six