Allergic rhinitis is a non-infectious inflammatory disease of the nasal mucosa in which exposure to allergens in atopic individuals is followed by the release of mediators (mainly histamine) mediated primarily by IgE, with the involvement of multiple immunoreactive cells and cytokines, among others. Allergic rhinitis is a global health problem that can lead to many diseases and loss of workforce. Patients with allergic rhinitis have an atopic body type and often show familial aggregation. Allergens are antigens that induce and react with specific IgE antibodies. They are mostly derived from animals, plants, insects, fungi or occupational substances. Their composition is proteins or glycoproteins and very rarely polysaccharides. Allergens are mainly divided into inhalant allergens and food allergens. Inhalant allergens are the main cause of allergic rhinitis. Mites, pollen and food are common allergens. The typical symptoms are mainly paroxysmal sneezing, clear nasal discharge, nasal congestion and nasal itching. Some of them are accompanied by loss of sense of smell. Signs include pale, edematous nasal mucosa and watery nasal discharge. Allergen skin prick test is positive and/or serum specific IgE is positive. Treatment: Avoid exposure to allergens: 1. Reduce the number of dust mites indoors; maintain the relative humidity of the living space to below 60%, but too low (e.g., below 30%-40%) will cause discomfort; clean carpets; wash bedding and curtains, mite allergens are soluble in water, washing textiles can remove most of them; use air purifiers with filters, vacuum cleaners, etc. 2, the corresponding pollen allergy season, avoid allergens. 3. Avoid allergens for patients allergic to animal fur. Medication: antihistamines, herbal medicines, anti-leukotrienes and glucocorticoids. Immunotherapy: Allergen-specific immunotherapy is commonly administered subcutaneously and sublingually. The course of treatment is divided into dose-accumulation phase and dose-maintenance phase, and the total course of treatment is not less than 2 years. Standardized allergen vaccines should be used. Surgical treatment: no improvement of nasal congestion symptoms by drug or immunotherapy, with obvious signs, affecting the quality of life; obvious anatomical variation of the nasal cavity with dysfunction; combined with chronic rhinosinusitis, nasal polyps and ineffective drug treatment.