Nasopharyngoscopy cannot directly observe the inside of the sinuses, but it can be used to roughly determine the presence of sinusitis based on the observed condition of the nasopharynx and nasal passages. There are indirect nasopharyngoscopy and fiberoptic nasopharyngoscopy. As the two types of nasopharyngoscopy are different, the structures observed are also different. Indirect nasopharyngoscopy is a procedure in which a mirror is inserted into the oral cavity and the nasopharynx is observed from the lower back of the nasopharynx. Anatomical parts such as the posterior nostrils, the opening of the Eustachian tubes, the adenoids, and the roof of the nasopharynx are observed, and symptoms such as pterygoid sinusitis and pus flowing from the posterior group of sinusitis can be detected through the nasopharyngoscopic examination. Fiber nasopharyngoscopy is from the nasal cavity into the mirror, in addition to the indirect nasopharyngoscopy can be observed in addition to the contents of the observation, but also can be observed to the nasal cavity of the lesion, when sinusitis with purulent secretions from the corresponding sinus mouth is observable, fiber nasopharyngoscopy can also be checked out sinusitis.