Children coughing at night and not so obvious during the day can be seen in respiratory tract infections, cough variant asthma or sinusitis, etc., need to be analyzed on a case-by-case basis. 1. Respiratory tract infections: the above phenomenon can be seen by the Mycoplasma pneumoniae and other pathogens caused by infection of acute bronchitis, bronchopneumonia, coughing in the early stages of the disease mostly present a dry cough, can be accompanied by fever and other symptoms. 2. Cough variant asthma: this kind of children’s cough often lasts for a long time, and it is obvious at night, part of it can also appear in the morning or after activities, and the lung function test suggests that the airway reactivity is increased. 3. Sinusitis: it refers to inflammation of the mucosa of the sinuses, mostly combined with the coexistence of rhinitis, at night, nasal secretion reflux can easily stimulate the respiratory tract to cough, mostly accompanied by nasal congestion, runny nose, etc., and some of them can be yellow pus, perfect sinus CT and nasal endoscopy can assist in the diagnosis. 4. Other: If the environment is dry at night, or the temperature is higher, it is also easy to stimulate the appearance of the above performance. The child’s cough at night and not so obvious during the day may also be related to other causes, it is recommended to consult a specialist to assess and determine the cause of the cough, and then carry out targeted treatment.