Nasopharyngoscopy is not a routine medical checkup program, and it is necessary to decide whether to do nasopharyngoscopy and the frequency of the examination according to the patient’s etiology and condition. Nasopharyngoscopy is a commonly used examination method in otorhinolaryngology. Through the examination, it can clarify whether there is any abnormal reaction in the nasopharynx of the patient, and can observe whether there is any inflammation, abnormal hyperplasia, tumors and other phenomena, which can be used for the preliminary diagnosis of nasopharyngeal diseases. Generally speaking, nasopharyngoscopy is not necessary when there are no uncomfortable symptoms. Once the discomfort symptoms appear, if it is acute adenoiditis, it can be checked again after 7-10 days of treatment. If adenoid hyperplasia and hypertrophy are considered, examination once every 3-6 months is recommended. If a tumor is suspected, it is recommended to check every 2 months or so at the beginning, and if there is no abnormality, it can be gradually extended to once every 6 months or a year. Nasopharyngoscopy is not only used for the above mentioned diseases, but can also be applied to postoperative examination and treatment, and eustachian tube function examination. It is recommended that patients consult their doctors in time and strictly follow the doctor’s instructions to do nasopharyngoscopy within the prescribed time to observe the development of the disease in time.