The child’s morning and evening cough may be related to the allergic cough caused by airway allergy, upper respiratory tract infection, pneumonia, etc. The specific analysis is as follows: 1. Allergic cough: if the child does not cough at other times, just cough in the morning and evening, sputum is not much, no fever, spirit is relatively good, there is no obvious abnormality most of the airway allergies caused by allergic cough. 2. Upper respiratory tract infection: Upper respiratory tract infection can also appear in the morning and evening cough symptoms, because the bacterial or viral infection, will cause irritation to the respiratory tract, causing cough. 3. Pneumonia: Inflammation of the lungs, under the stimulation of inflammation there will be phlegm, phlegm will produce coughing symptoms. The child’s morning and evening cough may also be related to other causes (such as cough variant asthma, etc.), it is recommended to go to the hospital in a timely manner to improve the relevant examinations to find out the cause, and then targeted treatment.