Sudden dry cough in a six year old child is not necessarily asthma, but may be related to chronic pharyngitis, upper respiratory tract infections, tonsil inflammation, allergies and other factors. The sudden onset of a dry cough in a six-year-old child may be related to variant asthma, but it may also be related to simple respiratory infections, such as upper respiratory tract infections, inflammation of the tonsils and chronic pharyngitis, or it may be related to allergic cough. Parents who find that the six-year-old child has the above symptoms, it is recommended to go to the hospital in time for relevant examinations, and if necessary, need to use cough medication, such as dextromethorphan, Folcodine and so on. The above drugs are recommended to be taken under the guidance of a doctor, and should not be used on their own, so as not to bring adverse effects on the child.