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Causes

By Mayo Clinic staff

It isn't clear why some people get asthma and others don't, but it's probably due to a combination of environmental and genetic (inherited) factors.

Asthma triggers are different from person to person. Exposure to various allergens and irritants can trigger signs and symptoms of asthma, including:

  • Airborne allergens, such as pollen, animal dander, mold, cockroaches and dust mites
  • Respiratory infections, such as the common cold
  • Physical activity (exercise-induced asthma)
  • Cold air
  • Air pollutants and irritants such as smoke
  • Certain medications, including beta blockers, aspirin and other nonsteroidal anti-inflammatory drugs
  • Strong emotions and stress
  • Sulfites, preservatives added to some perishable foods
  • Gastroesophageal reflux disease (GERD), a condition in which stomach acids back up into your throat
  • Menstrual cycle in some women
  • Allergic reactions to foods such as peanuts or shellfish

DS00021

May 31, 2008

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