Coughing at night without coughing during the day is usually caused by respiratory tract infections, cough variant asthma, nasal diseases, and so on. 1. Respiratory tract infections: when a child with a respiratory tract infection goes into a deep sleep at night, phlegm may accumulate in the throat area, and a pronounced cough may occur after severe irritation. 2. Cough variant asthma: the child’s cough often occurs at night or appears early in the morning episodes of cough, aggravated by exercise, sputum. 3. Nasal diseases: children with rhinitis, sinusitis, from the upright position to the lying position, a large amount of nasal secretions to the throat, will also be the same stimulation of cough reflex formation. If the child coughs at night and does not cough during the day, the symptoms are serious or have not been improved, it is recommended to go to the hospital in a timely manner.