Allergic rhinitis is a common and frequently occurring disease clinically. The definite diagnosis of allergic rhinitis primarily relies on the following points: First, the medical history, such as a history of living in an allergenic environment or a family history, along with a past history of the condition. Second, the clinical manifestations of allergic rhinitis, such as rhinitis, paroxysmal sneezing, a large amount of clear watery nasal discharge, and upon nasal examination, the nasal mucosa appears pale and swollen with clear watery discharge present in the nasal cavity. Additionally, supportive examinations can reveal an increase in eosinophils or lymphocytes in the complete blood count, or the detection of allergens, and specific IgE tests, etc. With these medical histories, clinical symptom manifestations, and supportive examinations, allergic rhinitis can be definitively diagnosed.