What environmental factors may trigger cough-variant asthma?

Generally, environmental factors such as allergen exposure, air pollution, climate change, respiratory infections, and occupational factors may trigger cough-variant asthma. The specific details are as follows:

1. Allergen exposure: Allergens such as pollen, dust mites, and animal dander may trigger allergic reactions leading to cough-variant asthma. These allergens are usually present in the air and enter the body through inhalation, irritating the respiratory mucosa and triggering asthma symptoms.

2. Air pollution: Air pollutants such as smog, vehicle exhaust, and industrial emissions in urban areas may irritate the respiratory tract and trigger cough-variant asthma. Harmful substances in these pollutants can damage the respiratory mucosa and increase the risk of asthma attacks.

3. Climate change: Sudden changes in temperature, especially exposure to cold air, may cause bronchospasm, thereby triggering cough-variant asthma. In addition, meteorological factors such as humidity and atmospheric pressure may also influence asthma attacks.

4. Respiratory infections: Upper respiratory tract infections such as viral infections or mycoplasma infections may cause inflammatory responses that irritate the respiratory tract and lead to cough-variant asthma. These infections are often accompanied by symptoms such as sputum production and fever.

5. Occupational factors: Chemicals and dust present in certain occupational environments may also act as triggers for cough-variant asthma. For example, workers in chemical, textile, and mining industries may be more susceptible to developing occupational asthma due to prolonged exposure to harmful substances.

To prevent and control cough-variant asthma, it is recommended to avoid contact with allergens and irritants, ensure good indoor air ventilation, and reduce exposure to air pollutants. Additionally, individuals at high risk for occupational asthma should enhance occupational protection and health education.