Allergic rhinitis may cause long-term cough, on the one hand, allergic reaction occurs in the pharynx to cause cough; on the other hand, nasal secretion backflow to the pharynx, causing cough. When allergic rhinitis attacks, the release of a variety of mediators, mainly histamine, causes an obvious tissue reaction in the nasal mucosa, which produces a large amount of secretion; secretion to the postnasal drip leakage, flow to the pharynx, which will trigger the pharynx to produce stimulation, which in turn triggers a cough. Due to the continuity of the respiratory mucosa, under the stimulation of allergens such as dust mites, pollen, animal fur, artemisia, etc., the allergic reaction will go from the nasal mucosa to the nasopharynx, trachea, and bronchial mucosa, which will lead to the emergence of bronchial asthma, which may be accompanied by expiratory dyspnea, wheezing and other symptoms, and the coughing symptom of perennial allergic rhinitis is even more common. Allergic rhinitis patients who have a cough may be caused by allergen stimulation, it is recommended to actively go to the hospital, under the guidance of the doctor’s diagnosis and treatment.