Left maxillary sinus cyst can be temporarily observed if the cyst is relatively small, if the cyst is larger, surgery can be considered. Left maxillary sinus cyst belongs to benign tumors, if the cyst is relatively small, there are no obvious symptoms, and many people only find out when they take a sinus CT, generally do not need special treatment, you can temporarily observe, and regular follow-up. If the cyst is found to grow faster in the follow-up or the cyst grows bigger, with corresponding symptoms, such as facial discomfort and headache, etc., surgical treatment can be considered, usually in the endoscopic maxillary sinus opening after the cyst is removed. Left maxillary sinus cysts, it is recommended that timely medical treatment to do a detailed examination, according to their own conditions, listen to the physician’s advice, choose the appropriate treatment program.