Allergic rhinitis can cause cough. Typical clinical symptoms of allergic rhinitis are sudden onset, recurrent itchy nose, frequent sneezing, profuse clear watery nasal discharge, and nasal congestion. At the same time, some patients may experience coughing up phlegm because of the irritating cough caused by the backward flow of the nasal secretions produced. Because of the continuity of the respiratory mucosa, some patients can also be complicated by allergic pharyngolaryngitis or cough variant asthma and bronchial asthma. Allergic rhinitis, also known as allergic rhinitis, occurs mostly in children, young adults, is an allergic reaction disease of the nasal mucosa, which can be divided into seasonal allergic rhinitis and perennial allergic rhinitis. Common allergens such as pollen, dust mites, animal hair, dander, dust, willow floss, etc., can also be seen in food allergy, such as milk, fish, shrimp, fruit, etc.. Prompt medical treatment is recommended.