The lack of ventilation in the nose will cause dizziness, brain swelling and other symptoms of oxygen deprivation. Clinically, some patients have deviated nasal septum, chronic rhinitis, adenoid hypertrophy, which will lead to poor nasal ventilation, long-term open-mouth breathing, followed by the formation of chronic hypoxia, dizziness, brain swelling symptoms. When nasal congestion occurs, it is necessary to go to the hospital in time to perform electronic rhinoscopy and sinus CT examination, to investigate whether there is a deviated nasal septum, chronic hypertrophic rhinitis or sinusitis. If it is diagnosed as nasal septum deviation, sinusitis or chronic hypertrophic rhinitis caused by nasal airlessness, it is necessary to carry out under general anesthesia or local anesthesia electronic rhinoscopy nasal septum deviation correction, partial ablation of nasal turbinate, sinus open surgery, adenoid ablation, after surgical treatment, nasal airlessness symptom can be relieved. If it is caused by simple rhinitis, topical dalfenacin spray or budesonide nasal spray can be used.