Cough is a common symptom in children. The respiratory tract of children is very sensitive to various stimuli, and various irritants such as respiratory secretions, foreign bodies, irritating gases and odors can easily cause coughing. Coughs in babies are commonly caused by colds, coughs caused by bronchitis, coughs caused by pneumonia; coughs caused by tuberculosis in the lungs; and allergic coughs due to being sensitive, cough variant asthma, or asthmatic coughs. A cough that is not good for half a month already belongs to subacute cough (acute cough is a cough lasting less than 2 weeks, subacute cough is a cough lasting 2-4 weeks, and chronic cough is a cough lasting more than 4 weeks). The first thing to do is to clarify the diagnosis. The first thing to do for a subacute cough is to rule out lung infection, which requires an auscultation examination by the doctor to understand the condition of the lungs; you also need to take X-rays to see if there is a lung infection and the extent of the infection. Secondly, it is also important to rule out tuberculosis in the lungs. In addition to a chest radiograph, a tuberculin test is required to diagnose tuberculosis. Children who are able to cooperate with inhalation and blowing need to have pulmonary function tests to rule out allergic cough or cough variant asthma. Once the diagnosis is clear, you need to cooperate with the doctor to do the appropriate treatment, for example: for common cold, oral cough medicine can be taken; for bronchitis and pneumonia, depending on the nature of the infection, oral antibiotics can be taken together with cough medicine; for pulmonary tuberculosis, anti-tuberculosis treatment is needed; for allergic cough or asthmatic cough, nebulizer inhalation treatment can be done together with oral anti-allergy medicine.