A child’s cough is stronger at night, often for two reasons: first, the child must be breathing with his or her mouth open at night, and the dry air enters the child’s respiratory tract directly through the mouth without being moistened by the child’s nasal cavity, which can easily lead to dryness of the respiratory mucosa and can be irritating, so it can induce the appearance of a cough. At this time, drinking more water at night, or adding a humidifier in the house and nebulizing and inhaling some saline before going to bed can effectively relieve the symptoms of a bad cough at night. Secondly, because the vagus nerve of the child is easily excited at night, it will lead to spasm of the bronchial smooth muscle, which will lead to contraction of the bronchial tubes, and the cough will be stronger at this time. Before going to bed, it is better to use cough and phlegm medicines or nebulized inhalation medicines, which can be taken orally, such as pulmonary cough combination or amiloride oral solution. In addition, nebulized inhalation medications such as terbutaline sulfate and budesonide can also be used.