Upper airway cough syndrome: chronic cough caused by various rhinitis (allergic and non-allergic), sinusitis, chronic pharyngitis, chronic tonsillitis, nasal polyps, adenoid hypertrophy, and other upper airway diseases. The previous diagnosis is postnasal drip (flow) syndrome. The cough is worse in the early morning or when the position is changed, and is often accompanied by nasal congestion, runny nose, dry throat with foreign body sensation, repeated clearing of the throat, and a feeling of mucus adhesion to the posterior pharyngeal wall; a few children complain of headache, dizziness, and low fever. If the sinusitis is caused by sinusitis, the corresponding changes can be seen on sinus X-ray or CT film. Targeted treatments such as antihistamines and leukotriene receptor antagonists, and nasal glucocorticoids are effective. Chinese medicine can be used to identify and treat the disease.