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Treatments that follow a nasal endoscopy will depend on what is discovered as a result of the procedure. Polyps, growths, infections or structural defects of the nasal passages are considered abnormal. Surgery, medications or other treatments may be advised after the results of the nasal endoscopy are analyzed. 

Endoscopic sinus surgery may be needed to correct a problem. For instance, it may be used to remove polyps or to correct a deviated septum. Sometimes medication is required to treat an infection or to control allergic reactions. If an allergy is the suspected cause of sinus problems, further tests such as a skin prick test or RAST test may be recommended.