The main clinical symptoms of maxillary sinus cyst are headache, swelling and pain in the maxilla, discomfort in the periorbital area, nasal congestion, intermittent yellow nasal discharge and clear nasal discharge, and a few patients may have toothache. A small percentage of patients with maxillary sinus cysts have no symptoms when they are small and are usually detected only during physical examination. Therefore, when the above typical symptoms appear, you need to go to the hospital for sinus CT and rhinoscopy in time. When the sinus CT and rhinoscopy are done, if the diagnosis of maxillary sinus cyst is confirmed, you need to undergo sinus endoscopic excision of maxillary sinus cyst under general anesthesia or local anesthesia. After excision, patients are routinely treated with nebulized inhalation and symptomatic anti-inflammatory therapy for 1 week, and oral Oronema for 2 weeks, which is reviewed after 1 month, and sinus cysts rarely recur after surgery.