Asthma severity may vary with the seasons, brought on by cold weather or the pollen season.
Triggers can include
- respiratory infections including flu, bronchitis, common cold and sinusitis
- physical exercise
- stress
- cold, damp
- tobacco smoke
- pollen, molds
- wine, beer
- yeasts
- dairy products
- soy milk
- contact with animals (fur, feathers)
- kapok in pillows and mattresses
- strong perfumes, cleaning products, solvents
- exposure to cold, dry air or weather changes
- overheated room
