Cough caused by sinusitis is due to the stimulation caused by the backflow of secretions, the spread of inflammation caused by pharyngitis, allergic causes and other factors. 1. Secretion backflow stimulation: Sinusitis patients can stimulate the sinus mucosa due to inflammation, which produces a large amount of secretion, when the secretion flows backward into the nasopharynx and oropharynx, it can stimulate the mucous membrane of the pharynx, causing cough. 2. Inflammation spread caused by pharyngitis: sinusitis is caused by bacterial, fungal or viral infection of the mucous membrane of the sinuses caused by inflammation, if the resistance of sinusitis patients is poor, it will make the inflammation spread to the throat, triggering cough. 3. Allergic causes: If sinusitis is caused by allergy, patients may inhale allergens, which may trigger allergic reactions, such as nasal itching, coughing, sneezing and other phenomena. It is recommended that patients go to the hospital in time and follow the doctor’s instructions to standardize the treatment, so as not to affect the daily life.