Cold air allergic rhinitis is a vasomotor reaction caused by cold air irritation, resulting in swelling of the nasal mucosa, paroxysmal sneezing, nasal congestion, runny nose, nasal itching, decreased sense of smell, throat discomfort, cough and other symptoms, is a common respiratory disease and is not contagious. Typical symptoms of cold-air allergic rhinitis: 1. Continuous sneezing. It is obvious in the morning or at night, when cold air stimulates, or when hot or cold alternates. 2. Clear symptoms of catarrh. Clear nasal discharge, accompanied by loss of smell. When there is a lot of nasal mucus, it flows uncontrollably and naturally. 3.Nasal congestion is obvious. Intermittent or continuous, unilateral or bilateral, with different degrees of severity. 4.Itchy nose, rubbing the nose, itchy feeling inside the nose is obvious, especially after cold air stimulation, it may be accompanied by itchy eyes, itchy ears and itchy throat. 5, accompanied by its irritation symptoms, pharyngeal itching, throat discomfort, irritating cough, mainly dry cough. 6.The mucous membrane of the inner wall of the nasal cavity is swollen, and the nasal mucosa is not pale. In summary, cold air allergic rhinitis is a series of symptoms that occur in the nose due to cold air irritation. In winter and spring, cold air is the most common irritation factor in daily life. Although it is similar to allergic rhinitis, it is not a disease.