What causes asthma?
Asthma has a strong genetic component. If you have asthma, others in your family may have asthma as well. Allergens, irritants (such as cigarette smoke), respiratory infections, weather changes and exercise can trigger asthma symptoms. However, whatever one’s triggers are, the underlying lung problem of inflammation remains the same.
Allergic asthma is triggered by allergic reactions to allergens such as pet dander, dust or dust mite, mold or pollen. Sometimes the asthma may only occur during the pollen seasons.
Seasonal asthma is triggered by seasonal allergic reactions to allergens such as trees, grasses or weeds.
Non-allergic asthma is triggered by irritants in the air that you breathe such as tobacco smoke, wood smoke, room deodorizers, fresh paint, perfume, etc.
Exercise-induced asthma is triggered by exercise or physical activity.
Nocturnal asthma can occur with any asthmatic. Asthma symptoms will often increase or worsen at night.