The asthma commonly referred to is bronchial asthma, which is primarily characterized by recurrent episodes of breathing difficulty. This difficulty in breathing is mainly manifested as chest tightness and shortness of breath. Additionally, asthma is often triggered by upper respiratory tract infections. Therefore, most asthma patients experience coughing and expectoration during acute attacks. There is also a special type of asthma known as cough variant asthma, which, as the name suggests, is primarily characterized by coughing. This type of cough is generally dry with little to no sputum, or it involves a small amount of mucous sputum. The coughing can occur during the day but is generally more pronounced at night.