Allergic rhinitis may be related to genetic factors, and is mainly caused by allergic reactions to allergens (inhalant allergens, food allergens, direct contact allergens) in atopic body. 1. Genetic factors: allergic rhinitis, also known as allergic rhinitis, has an atopic constitution and usually shows family aggregation, which is related to heredity to a certain extent, and studies have shown that it is associated with certain genes. 2. Allergens (1) Inhalation allergens: living environment with dust mites, animal fur, pollen, willow floss, etc. can induce allergic rhinitis. (2) Food allergens: such as eating food eggs, fish, shrimp, milk, etc. to cause allergic reactions. (3) Direct contact with allergens: contact with certain cosmetics, paints, topical medicines, etc. can cause allergic reactions. Allergic rhinitis patients can actively consult a doctor for systematic examination to clarify the diagnosis and cause of the disease, and standardize the use of medication and treatment under the guidance of a physician.