Allergic rhinitis is afraid of cold. Allergic rhinitis is an allergic inflammatory manifestation of the nasal mucosa that occurs in patients with specific sensitivities and exposure to allergens, common allergens are inhalational, ingestive and physical and chemical factors. Inhalant allergens are the most common, which are distributed in the air, such as pollen, grass, dust, mite metabolites, animal feathers and so on. Ingested ones are rare and are allergic to a specific food. Physical and chemical factors are mainly cold and hot ambient temperatures, various irritating odors, etc. For example, allergic rhinitis is more likely to be triggered when you suddenly go to a colder outdoor environment or encounter cold air in a warm room, and some patients suddenly experience allergic rhinitis when they encounter hot soup.