Final answer:
Common causes of asthma exacerbation include environmental factors, such as air pollution and allergens, as well as stress and emotions.
Step-by-step explanation:
Asthma exacerbation, also known as an asthma attack, can be caused by various factors. Environmental triggers such as air pollution, allergens (e.g., pollen, mold, pet hairs), cigarette smoke, airway infections, cold air or sudden temperature changes, and exercise can all contribute to an exacerbation. Additionally, certain regions with high levels of pollution and low air quality are known for having higher rates of exacerbation. Psychological factors, stress, and emotions can also be common triggers of asthma attacks.