There are many causes of sleep-wake cough, and the common causes include inhaled dust, upper respiratory tract infection, lung disease and so on. 1. Inhalation of dust: Due to inhalation of allergic dust in the air, the patient with waking cough will have allergic cough symptoms due to the high reactive state of the respiratory tract, and the symptoms of waking cough can be seen at this time. 2. Upper respiratory tract infection: due to the waking cough patients with decreased body resistance, and thus susceptible to external bacterial, viral attack, bacterial or viral respiratory tract infection complications. Bacteria and viruses stimulate the mucous membrane of the respiratory tract, and the secretions increase and cannot be discharged when sleeping, so the phenomenon of waking up coughing occurs because the phlegm is discharged through coughing after waking up. 3. Lung disease: when patients suffer from pneumonia, lung cancer and other lung diseases, the lungs will produce phlegm, which will reflux to the bronchial tubes and irritate the bronchial mucosa, which will also cause waking cough. Waking up cough may also be related to other diseases, it is recommended that patients with waking up cough go to a regular hospital to determine the cause of the disease and then carry out targeted treatment.