When you have asthma, your airways react to things in the world around you. Doctors call these asthma triggers. They might cause symptoms or make them worse. Common asthma triggers include:
Infections like sinusitis, colds, and the flu
Allergens such as pollens, mold, pet dander, and dust mites
Irritants like strong odors from perfumes or cleaning solutions
Air pollution
Tobacco smoke
Exercise
Cold air or changes in the weather, such as temperature or humidity
Gastroesophageal reflux disease (GERD)
Strong emotions such as anxiety, laughter, sadness, or stress
Medications such as aspirin
Food preservatives called sulfites, found in things like shrimp, pickles, beer and wine, dried fruits, and bottled lemon and lime juices
