4-year-old baby cough in the middle of the night only cough what happened

The child coughs in the middle of the night, and only coughs for a while. This belongs to paroxysmal cough, which usually occurs in tracheitis, pneumonia, cough bronchitis and other diseases. If the cough lasts for more than one month and there is no sign of infection, it should be cough variant asthma, which can be inhaled by budesonide atomization.