Once the doctor takes a detailed medical history and runs some tests, the doctor can classify how severe your asthma is. This helps your doctor decide which treatment is best for you. Your asthma should be classified again at every office visit. There are four levels of severity:
Click the buttons above to see the four levels of asthma severity. Asthma is classified based on how often symptoms occur during the day, how often they occur at night, and spirometry results.
Regardless of your asthma's classification, any single asthma episode can range from mild to severe. This is true for anyone with asthma.
National Asthma Education and Prevention Program Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma. Rockville, MD. National Heart, Lung, and Blood Institute, US Dept of Health and Human Services; 2007. NIH publications 08-4051.