Asthma is a chronic lung disease characterized by inflammation and narrowing of the airways. [1] People with asthma experience recurrent episodes of wheezing, breathlessness, chest tightness, and coughing.<a href="#ref-2" id="ref-link-2" class="ref-link popover" data-tooltip='<div><p class="mb-3">National Heart, Lung, and Blood Institute (US). <a href="https://www.ncbi.nlm.nih.gov/books/NBK7232/" target="\_blank" rel="noopener noreferrer">National Asthma Education and Prevention Program, Third Expert Panel on the Diagnosis and Management of Asthma. Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma</a></p>(2007-08)</div>'> [2] These episodes are often worse in the mornings and evenings.

What is asthma?

Asthma is a chronic lung disease characterized by inflammation and narrowing of the airways.^[1] People with asthma experience recurrent episodes of wheezing, breathlessness, chest tightness, and coughing.^[2] These episodes are often worse in the mornings and evenings.

References

^The content of this page was partially adapted from MedlinePlus of the National Library of Medicine
^National Heart, Lung, and Blood Institute (US)National Asthma Education and Prevention Program, Third Expert Panel on the Diagnosis and Management of Asthma. Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma(2007-08)