The cause of recurrent cough in sinusitis is mainly caused by irritation of the pharynx by nasal secretions and other irritants, but can also be caused by cough variant asthma and other diseases. Sinusitis patients may have sinus mucosa vasodilatation, congestion, its plasma or mucus hypersecretion. A large amount of purulent mucus secretion and inflammatory factors can stimulate its mucosa to cause coughing, coughing up sputum and so on. At the same time, a large amount of secretion can block the nasal cavity, causing the patient to perform open-mouth breathing and inducing cough. Some patients may also have allergic rhinitis, cough variant asthma and other diseases, which can also cause recurrent cough symptoms, and should be identified. If there is any discomfort, it is recommended to consult a doctor in time for blood tests and other appropriate tests to clarify the diagnosis and treatment.