Coughing is a common symptom in children, but coughing is not a bad thing in itself, but a protective reflex of the body’s defense function. When there are secretions or foreign bodies in the respiratory tract, coughing can remove them, which is beneficial to the body. However, coughing also has a negative side. In the early stages of various respiratory infections, the respiratory tract is only congested and edematous, and there are no secretions, so the inflammatory stimulus causes a dry cough without phlegm, which is not protective for the body. However, many parents give cough suppressants to their children when they have a slight cough. In fact, it is not necessary to take cough suppressants for coughing, as this may inhibit the cough reflex and affect the coughing out of sputum, which is not conducive to recovery from the disease. However, if the cough is irritatingly dry or the sputum is sticky and not easy to cough up, cough suppressants and expectorants can be used under the guidance of a doctor.