There are many causes of coughing at night and not during the day in children, and the following are common: First, mycoplasma infection, which is common in older children, with coughing symptoms that are not very obvious but relatively significant at night, mostly accompanied by fever as hyperthermia, with heavy symptoms on X-ray chest examination, and good results with treatment such as azithromycin or roxithromycin. Secondly, whooping cough, cough is spasmodic cough, which is continuous, persistent and irritating. There is deep inspiration at the end of the cough, followed by a high-pitched cockle sound. Routine blood tests show an increase in leukocytes and lymphocytes, and treatment with erythromycin or azithromycin is effective. Thirdly, cough variant asthma, treated by anti-inflammatory drugs is less effective, and the effect is better after giving bronchodilator drugs, which is significant at night. Therefore, it is better to take the child to the hospital for examination and give clear treatment according to the examination results.