Nasal cavity has the function of ventilation, under normal circumstances when the nasal cavity ventilation is not too obvious feeling, if the patient feels that there is an abnormality in the nose out of the air, clinically there are common cases as follows: 1, the nose ventilation is not smooth, may be the manifestation of nasal congestion, common diseases are rhinitis, inferior turbinate hypertrophy, nasal septum deviation or nasal long things, common nasal polyps, nasal tumors, and other related diseases, resulting in the nasal cavity ventilation is not Smooth, the patient will feel the nose out of the problem. It is recommended to go to the ENT department to improve the nasal endoscopy, if necessary, improve the sinus CT and other tests, to identify the specific diseases for symptomatic treatment. 2, recently there is fire, cold or acute rhinitis, the nasal mucosa is congested and swollen, the nerve reflexes of the nasal mucosa are very sensitive, the patient exhales hot gas, can feel the nose out of the heat, and other manifestations.