Dry cough at night, little cough during the day, cough for more than 8 weeks, normal chest radiograph, most common cause of cough variant asthma, some patients with allergic rhinitis, allergic pharyngitis, and in some cases allergic conjunctivitis, prone to itchy throat, sneezing, runny nose, and itchy eyes. Pulmonary function and bronchial excitation or diastolic tests or monitoring of the 24-hour peak expiratory flow rate variability are required to confirm the diagnosis. Other common causes of chronic cough include upper airway cough syndrome, eosinophilic bronchitis, allergic cough, and gastroesophageal reflux cough, etc. Once the diagnosis is confirmed, the right medication can be prescribed, and cough variant asthma needs to be treated as asthma.