The subject of asthma what is it caused by encompasses a wide range of important elements. | American Lung Association. The most common factors for developing asthma are having a parent with asthma, having a severe respiratory infection as a child, having an allergic condition, or being exposed to certain chemical irritants or industrial dusts in the workplace. Asthma - Symptoms and causes - Mayo Clinic. Find out what can trigger asthma and how to relieve your symptoms and breathe easier. Similarly, asthma - Causes and Triggers | NHLBI, NIH.
Asthma triggers are things that set off or make asthma symptoms worse. Common triggers include: Learn about avoiding triggers to help manage your asthma. What Causes Asthma and What Triggers an Attack - Verywell Health. Asthma is a condition that makes breathing difficult due to swelling and tightening of the airways. It is caused by a combination of genetic, environmental, and lifestyle factors, such as a family history, living in an area with poor air quality, or having a history of smoking.

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