If there is only one nose that is not ventilated, the following diseases are mainly considered: 1. deviated nasal septum and enlarged inferior turbinates, you can do septum correction surgery, after the surgery is completed, the patient’s nasal ventilation should be improved. 2. sinusitis with nasal polyps, if unilateral nasal polyps in the nasal cavity, due to nasal polyps blocking the nasal cavity, it will lead to poor nasal ventilation, this situation can do sinus opening surgery and nasal polyp The surgery can be done for sinus opening and nasal polyp removal. Other diseases, such as involuted papilloma, which occurs in the unilateral nasal cavity and sinuses, can also lead to unilateral nasal ventilation, which is gradually aggravated. In addition, there are also tumors of the nasal cavity. All in all, if a patient has unilateral nasal hypopnea, it is recommended to go to the ENT clinic for nasal endoscopy and sinus CT examination, which can generally confirm the diagnosis.