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Table 1 Etiological classification of rhinitis [1]

From: Allergic rhinitis

IgE-mediated (allergic) • IgE-mediated inflammation of the nasal mucosa, resulting in eosinophilic and Th2-cell infiltration of the nasal lining
• Further classified as intermittent or persistent
Autonomic • Vasomotor
• Drug-induced (rhinitis medicamentosa)
• Hypothyroidism
• Hormonal
• Non-allergic rhinitis with eosinophilia syndrome (NARES)
Infectious • Precipitated by viral (most common), bacterial, or fungal infection
Idiopathic • Etiology cannot be determined