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Asthma is a long-term inflammatory disease of the airways of the lungs [5]. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and bronchospasm [5]. Symptoms include wheezing, breathlessness, chest tightness, and nighttime or early morning coughing [1][3]. Asthma can be managed with medications such as inhalers to reduce inflammation in the airways and open them up for easier breathing [4][6], but there is no cure for asthma at this time. Exposure to environmental triggers such as allergens or pollutants can worsen asthma symptoms [2][7].

[1]: Asthma - What Is Asthma? | NHLBI, NIH (
[2]: Asthma | CDC (
[3]: Asthma | Asthma Symptoms | Asthma Attack | MedlinePlus (
[4]: Asthma: Types, Causes, Symptoms, Diagnosis & Treatment (
[5]: Asthma - Wikipedia (
[6]: Asthma | American Lung Association (
[7]: Asthma | US EPA (


Asthma is a chronic lung condition that causes difficulty breathing. Symptoms of asthma include wheezing, coughing, chest tightness, and shortness of breath. Asthma can be triggered by allergens such as dust mites or pet dander, exercise, cold air, smoke or other irritants in the environment. Treatment for asthma includes avoiding triggers when possible and using medications to control symptoms.