Allergic rhinitis is abbreviated as allergic rhinitis, also known as allergic rhinitis. It is an allergic reaction that occurs in the nasal mucosa and is also a common manifestation of respiratory allergy. Sometimes it coexists with bronchial asthma. The incidence of this disease has increased significantly in the past 20 years, especially in developed countries. The age of onset is mainly young and middle-aged, but it is now found that children are also more common. Although there is no significant difference in the incidence rate between genders, female hormones can aggravate allergic reactions. It includes seasonal rhinitis and perennial rhinitis. Various clinical rhinitis: acute rhinitis, chronic rhinitis (chronic simple rhinitis, chronic hypertrophic rhinitis, chronic dry rhinitis), dry rhinitis, atrophic rhinitis, caseous rhinitis, drug-induced rhinitis, vasomotor rhinitis, eosinophilic non-allergic rhinitis, hyperreflexic rhinitis, etc.