Nasopharyngolaryngoscopy is a routine examination in the ENT department, the examination precautions are as follows: 1. Patients try to fast before doing nasopharyngoscopy, because some patients have nausea and even vomiting when doing this examination, if done on an empty stomach, nausea and vomiting will be reduced a lot. 2. Local anesthetic is applied when doing the examination, such as dacronin syrup and dicaine, patients pay attention to the process of anesthesia to see if there is any The patient should pay attention to any allergy during the numbing process. After the laryngoscopy, try not to eat or drink for 2-3 hours, because due to the effect of anesthesia, eating and drinking are prone to choking and coughing, and even choking.