What causes Asthma?

The cause of asthma is not known. It does seem to run in some families. Current research suggests a combination of environment, genetics and biology may lead to asthma. Possible triggers of an asthma attack in a person with asthma include:

• Exercise
• Cold weather
• Viral illness
• Sinusitis
• Gastroesophageal reflux disease (GERD)
• Sulfites used in dried fruits and wine
• Medications, such as aspirin , ibuprofen , and beta-blockers
• Exposure to irritants or allergens, including:
  • Cigarette smoke, smoke from a wood-burning stove
  • Pet dander
  • Dust
  • Chemicals
  • Mold and mildew
  • Pollen
  • Smog or air pollution
  • Perfumed products