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Asthma triggers are factors or stimuli that provoke the exacerbation of asthma symptoms or increase the degree of airflow disruption, which can lead to an asthma attack. [1] An asthma attack is characterized by an obstruction of the airway , hypersecretion of mucus and bronchoconstriction due to the contraction of smooth muscles around the ...
Florida. Triggers for asthma attacks vary from person to person, too, although there are several common triggers. The Centers for Disease Control and Prevention (CDC) lists these common culprits ...
Among the various types of asthma (classified according to their trigger), allergy-induced asthma is the most common, affecting about 60 percent of people with the condition, according to the ...
Exercise can trigger bronchoconstriction both in people with or without asthma. [116] It occurs in most people with asthma and up to 20% of people without asthma. [116] Exercise-induced bronchoconstriction is common in professional athletes. The highest rates are among cyclists (up to 45%), swimmers, and cross-country skiers. [117]
Most asthma attacks are triggered by exposure to something. It can be an allergen, like pollen or pet dander, smoke, air pollution or fumes, such as from cleaning supplies or strong perfume.
The airways of asthma patients are "hypersensitive" to certain triggers, also known as stimuli (see below). (It is usually classified as type I hypersensitivity.) [4] [5] In response to exposure to these triggers, the bronchi (large airways) contract into spasm (an "asthma attack").
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