The first is the nasal endoscopy, which is widely used clinically and can examine the patient’s nasal mucosa, middle and lower nasal passages, and olfactory fissure and other parts of the deep nasal cavity, and it costs about $100. The second is the electronic nasopharyngoscopy, which can also examine the nasal cavity and all nasal passages, as well as the posterior nostril and the nasopharynx. During the examination, a smear is taken for reference and the price is about 100-150 yuan. The third is the allergen test, which is mainly for patients with allergic rhinitis. The clinical examination of what patients are allergic to is mostly a blood test, and the price of the test is about 250-300 yuan. The fourth is CT nose examination, which examines the deep structure inside the nasal cavity to determine whether there are nasal bone fractures, nasal septum deviation, turbinate hypertrophy, turbinate deformity, nasal polyp, nasal neoplasm, etc. It costs about 300 yuan.