Respiratory infection may cause inflammation of the air tubes.
Allergy to various substances, including house-dust mites, animal fur or feathers, pollen and some food.
Night-time attacks in children are often associated with house-dust mites, down pillows or pets sleeping in some people.
Sudden change in the weather or air temperature, especially cold conditions.
Exercise, especially explosive activities.
Tuesday, February 3, 2009
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