The phenomenon of a child’s morning cough is often caused by the child’s breathing habits if no respiratory infection has occurred. Many children sleep with their mouths open at night, and dry air enters the respiratory tract directly through the mouth without being moistened by the nasal cavity, resulting in dryness of the respiratory mucosa, which can be irritating at this time, so the cough will appear when they get up in the morning. This condition is often not too serious and can be relieved by drinking more water. However, if a respiratory infection occurs, a large amount of inflammatory exudate is secreted in the respiratory system at night while sleeping, and these substances accumulate in the respiratory tract. When the child wakes up in the morning, in order to eliminate this phlegm, that is, inflammatory exudate, the child will have a cough in the morning. Often, coughing symptoms can be effectively relieved after coughing up the phlegm. At this time, it is better to use cough and phlegm-suppressing drugs, such as aminoglutethimide oral solution.