Asthma Symptoms
- Coughing
- Shortness of breath
- Chest tightness
- Wheezing（a whistling or squeaky sound in your chest when you breathe, especially when exhaling）
Asthma Triggers
- Outdoor allergens, such as pollens from grass, trees and weeds
- Indoor allergens, such as pet dander, dust mites and mold
- Certain drugs and food additives
- Irritants in the air, such as smoke, chemical fumes and strong odors
- Colds, the flu or other illnesses
- Exercise (although people with asthma can benefit from some exercise)
- Stress
- Weather conditions, such as cold air or extremely dry, wet or windy weather