Sphenopalatine Ganglion Acupuncture for Allergic Rhinitis

* Inclusion Criteria: * Diagnosis of allergic rhinitis according to the Chinese Guidelines for Diagnosis and Treatment of Allergic Rhinitis (2022 Revision), meeting all of the following criteria: * At least two of the following symptoms: paroxysmal sneezing, watery rhinorrhea, nasal itching, and nasal obstruction, with symptoms lasting or accumulating for at least 1 hour per day; ocular symptoms such as itching, tearing, or redness may also be present. * Anterior rhinoscopy or nasal endoscopy showing findings consistent with allergic rhinitis, such as pale or edematous nasal mucosa, turbinate swelling, and watery nasal secretions. * At least one positive allergen test, including a skin prick test, serum allergen-specific immunoglobulin E (sIgE) test, or nasal allergen provocation test. * No use of antihistamines, intranasal or systemic corticosteroids, leukotriene receptor antagonists, allergen immunotherapy, or other treatments that may affect efficacy assessment within 2 weeks before enrollment. * Baseline Total Nasal Symptom Score (TNSS) sufficient for efficacy assessment according to the study protocol. * Voluntary participation in the study and provision of written informed consent. * Exclusion Criteria: * Presence of acute upper respiratory tract infection, acute or chronic rhinosinusitis, nasal polyps, severe nasal septal deviation, rhinitis medicamentosa, vasomotor rhinitis, infectious rhinitis, or other forms of non-allergic rhinitis. * Presence of an autoimmune disease or a psychiatric or psychological disorder that may interfere with study participation or outcome assessment. * Pregnancy or breastfeeding. * Coagulation disorders, current use of anticoagulant medications, local skin infection at the acupuncture site, a tendency to develop excessive scarring, or inability to tolerate acupuncture. * Known severe hypersensitivity or contraindication to any component of the study medication or to the study intervention. * Current participation in another clinical study, or any other condition that, in the investigator's judgment, makes the participant unsuitable for this study.