Skin prick test: to clarify whether allergy and allergens are present. Nasal smear cell classification: to clarify the degree of eosinophil infiltration and to assist in determining the severity of allergic rhinitis. Blood routine: count of eosinophils in the blood. Total blood IgE: to observe the allergic IgE antibodies in the province. Nasal endoscopy: to examine the nasal mucosa edema, nasal cavity structure and nasopharyngeal lesions. Sinus CT: to understand the condition of sinus lesions.