When it is cold, the nose is not breathable, considering vasomotor rhinitis, acute rhinitis or hypertrophic rhinitis and other diseases. 1. vasomotor rhinitis: the patient’s nasal mucosa is stimulated by the cold air, so that it appears congestion, swelling, which leads to nasal congestion performance, so it can be seen when the day is cold point of the nose are airtight situation. 2. Acute rhinitis: cool respiratory viral infection caused by acute inflammation of the nasal mucosa, nasal congestion, sneezing and headache. 3. hypertrophic rhinitis: when the patient from simple rhinitis further progress, often can make intermittent or alternating nasal congestion into persistent nasal congestion. At this time the patient himself more nasal congestion phenomenon, if the cold air stimulation, capillary further expansion, the turbinate so reactive increase, so that the nasal cavity ventilation space further reduced, so see the cooler day point of the nose is not breathable situation. If the symptoms continue to be unrelieved, it is recommended to consult the hospital as soon as possible, after the diagnosis is clear and standardized treatment.