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Asthma

Asthma Symptoms and Causes

Asthma, which can be allergic or non-allergic, is a chronic, inflammatory lung disease involving recurrent breathing problems. The characteristics of asthma are three airway problems:

  • Obstruction
  • Inflammation
  • Hyper-responsiveness

Common asthma triggers include:

  • Animals (pet hair or dander)
  • Dust
  • Changes in weather (most often cold weather)
  • Chemicals in the air or in food
  • Exercise
  • Mold
  • Pollen
  • Respiratory infections, such as the common cold
  • Strong emotions (stress)
  • Tobacco smoke