Causes of asthma

The causes of asthma may include genetic factors, environmental factors, respiratory tract infections, airway hyperresponsiveness, etc.

1. Genetic factors

Asthma has a polygenic genetic tendency, and the incidence has a certain family aggregation phenomenon.

2. Environmental factors

Environmental factors such as dust mites, pollen, pet hair and other allergens, as well as smoking, air pollution, etc. may induce asthma.

3. Respiratory tract infections

Respiratory tract infections, especially viral respiratory tract infections, such as rhinovirus, influenza virus, etc., are also associated with asthma.

4. Airway hyperresponsiveness

Airway hyperresponsiveness refers to the airway's strong or premature contraction response to various stimulating factors, which is another important factor in the development of asthma patients.