Asthma is a chronic airway inflammation involving multiple inflammatory cells. After being diagnosed with asthma, a patient may exhibit airway hyperresponsiveness. Upon exposure to allergens or cold stimuli, the patient often experiences wheezing, breathlessness, chest tightness, and coughing. These coughing symptoms generally worsen during the early morning and night, especially after exposure to odors or cold air, which can easily trigger coughing. The cough is primarily dry, without phlegm or with a small amount of white sticky phlegm, accompanied by symptoms like nasal itchiness, throat itchiness, and itchiness in the voice box. Treatment can involve the use of bronchial asthma medications or warm water, which can also lead to improvement. This describes some unique aspects of cough-variant asthma.