Phlegm in the throat from rhinitis, this is mainly due to the appearance of pharyngolaryngitis caused by long-term rhinitis, and the backflow of nasal mucus into the throat from long-term rhinitis, resulting in the patient eventually having phlegm in the throat. Clinically, for this condition, it is recommended that patients go to the ENT clinic for nasal endoscopy and electronic rhinolaryngoscopy. The nasal endoscopy is mainly to see if the patient has bilateral inferior turbinate hypertrophy, to see the condition of the nasal mucosa, and to see if there is a deviated nasal septum. If the patient has yellow pus nasal discharge for a long time, it is recommended to do sinus CT examination to exclude sinusitis and other diseases. If the patient is determined to have pharyngitis caused by rhinitis through the examination of the outpatient doctor, the following treatment can be done: 1. saline rinse, rinse can flush out the nose secretion, so as to reduce the flow of phlegm; 4, such patients must also do electronic nasopharyngoscopy to see if there are nasopharyngeal cysts, resulting in the repeated backflow of nasal mucus into the throat.