Postnasal drip syndrome, i.e. postnasal drip syndrome, postnasal drip syndrome, its symptoms include cough, cough sputum, nasal discomfort, throat discomfort and so on. 1. Cough and sputum: regular episodes of cough, sputum and post-inspiratory choking at night; paroxysmal or persistent cough. 2. Nasal discomfort: sneezing, nasal pain, nasal congestion, increased nasal secretion. 3. Pharyngeal discomfort: most of the patients may have discomfort, itching or burning sensation in the throat due to the backflow of nasal secretion, often clearing the throat, or having the sensation of foreign body in the pharynx, pharyngeal congestion or mucus adherence in the posterior wall of the pharynx. There are also some patients will appear headache, dizziness, poor sleep at night, daytime drowsiness and other systemic symptoms, it is recommended to actively consult a doctor, standardized diagnosis and treatment.