With the advancement of medical technology, nasal endoscopic surgery has become increasingly mature, and functional nasal endoscopic surgery (FESS) can be used as a routine surgical method for sinusitis, nasal polyps, and deviated nasal septum area to treat sinusitis by improving the drainage and ventilation of the sinus opening area. However, many people mistakenly believe that sinusitis is immediately cured after surgery, and continue to smoke and drink, and do not go to the hospital for review, in fact, they do not understand that nasal endoscopic surgery is only 40% of the treatment completed, and review is equally important. Because it takes some time to recover from an open cavity, it is necessary to clean the cavity regularly after surgery to further clear the edematous tissue and separate the adhesions to keep the open sinus opening open, which usually takes six months to a year, and some patients also need nasal spray hormones to reduce edema. It is also very important to quit smoking and drinking. It is important to understand the precautions for nasal endoscopy surgery, consult with the doctor in detail about the pre-surgery and post-surgery precautions, and strictly comply with them in order to achieve the best treatment results.