Cough caused by sinusitis is due to irritation caused by the flow of purulent nasal discharge from the posterior nostril into the pharynx during sinusitis. Usually after treating sinusitis, the cough will gradually get better, so it is not very serious. In the case of sinusitis, examination of the nasal cavity reveals a purulent discharge that can flow into the pharynx from the posterior nostril, and sinus CT can confirm the diagnosis. Treatment requires active treatment of sinusitis, which is divided into conservative treatment and surgical treatment. Conservative treatment can be done with clarithromycin orally, tretinoin nasal spray, chenode orally, etc. If the above symptoms do not improve significantly after about four weeks of treatment, surgery can be considered. At present, most of them adopt nasal endoscopic sinus opening surgery, and need to strengthen the change of medicine after the surgery. After the sinusitis is cured by the above treatment, the postnasal leakage caused by sinusitis will also disappear, and the cough will disappear naturally.