A chronic laryngitis, which is an infectious disease of the upper respiratory tract, is the most common cause of phlegm in the throat. A specialist should carefully check the nasopharynx and throat for chronic lymphatic follicular hyperplasia and enlarged tonsils. If these changes occur, laryngogenic cough should be considered. At this time, it is necessary to avoid the use of lozenges, as they tend to aggravate local coughing symptoms and make the foreign body sensation more pronounced, which is not conducive to coughing and coughing up phlegm. Phlegm in the throat that cannot be coughed up is more likely to occur in autumn. Since the climate is drier in autumn, the respiratory tract loses a lot of water, which can easily lead to a dry and itchy throat and poor coughing. Patients are advised to drink more hot water and talk less to avoid worsening the symptoms of dry throat which leads to dry throat, coughing up phlegm and other related discomfort.