Dizziness and nasal congestion are symptoms of dizziness and discomfort caused by poor nasal ventilation. Common causes of nasal congestion include rhinitis, sinusitis, enlarged turbinate, deviated septum and nasal tumor. 1. Rhinitis: mainly associated with allergic reactions and pathogenic stimuli, can cause nasal mucosal edema, oozing, resulting in poor ventilation, causing the corresponding symptoms. 2. Sinusitis: mainly due to pathogenic infections, the acute stage will lead to obvious sinus mucosal edema, exudation, effusion, acute delay will lead to chronic sinusitis, part of the sinus will lead to sinus mouth blockage, sinus wall bone destruction. Both conditions will affect the nasal patency and cause corresponding symptoms. 3. Turbinate hypertrophy: mainly due to various physical and chemical stimuli caused by the thickening of the mucous membrane of the nasal turbinate, the volume increases, after the increase will cause the narrowing of the nasal cavity gap, causing the corresponding symptoms. 4. Nasal septum deviation: severe nasal septum deviation will affect the smoothness of airflow, which will further lead to the production of related symptoms. 5. Nasal tumor: Nasal tumor itself belongs to occupying lesion, which will directly affect the condition of nasal cavity and airway and cause related symptoms. In addition, foreign body in nasal cavity and medication can also lead to related symptoms; if the symptoms of obvious dizziness and nasal congestion are not relieved, it is necessary to consult a doctor for observation and standardized treatment under the guidance of a clinician.