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Causes
By Mayo Clinic staffAn overly sensitive immune system makes your airways (bronchial tubes) become inflamed and swollen when you're exposed to certain triggers. Asthma triggers vary from person to person. Common asthma attack triggers include:
- Pollen, pets, mold and dust mites
- Upper respiratory infections
- Tobacco smoke
- Exercise
- Inhaling cold, dry air
- Gastroesophageal reflux disease (GERD)
For many people, asthma symptoms get worse with a respiratory infection such as a cold. Some people have asthma flare-ups caused by something in their work environment. Sometimes, asthma attacks occur with no apparent cause.
- Fanta CH. Treatment of acute exacerbations of asthma in adults. http://www.uptodate.com/home/index.html. Accessed Oct. 24, 2008.
- Expert panel report 3 (EPR-3): Guidelines for the diagnosis and management of asthma-Summary report 2007. Journal of Allergy and Clinical Immunology. 2008;121:1330.
- Mangan JM. What do patients need to know about their asthma? http://www.uptodate.com/home/index.html. Accessed Oct. 24, 2008.
- Spirometry and other lung function tests fact sheet. American Lung Association. http://www.lungusa.org/site/c.dvLUK9O0E/b.43918/k.B71/Spirometry_and_Other_Lung_Function_Tests_Fact_Sheet.htm. Accessed Oct. 22, 2008.
- Questions and answers on final rule of albuterol MDI's. Food and Drug Administration. http://www.fda.gov/CDER/mdi/mdifaqs.htm. Oct. 22, 2008.
