Allergic rhinitis is not caused by fire. Allergic rhinitis is a highly reactive nasal disease caused by the mucous membrane of the nasal cavity after a susceptible individual has been exposed to an allergen. Its main clinical manifestation is episodic sneezing and runny nose, which is mainly clear nasal discharge and can be accompanied by nasal congestion and nasal itching. Patients with allergic rhinitis should check for allergens and try to avoid contact with allergens if they can be identified, and certain specific allergens can be desensitized. If the patient cannot completely avoid contact with allergens, or if the symptoms of allergic rhinitis are more pronounced, they can be controlled by medication. Commonly used medications include topical nasal spray glucocorticosteroids and oral antihistamines, such as loratadine tablets. Anti-leukotrienes, such as montelukast chewable tablets, are used to control allergies. If the patient’s allergy symptoms are severe, it is recommended that the patient wears a mask as much as possible when going out, does not go to places with more dust and pollen, and exercises regularly to enhance physical fitness.