NAR can be divided between non-inflammatory and inflammatory NAR.
Inflammatory NAR can also be further broken down into different subtypes based on nasal smear cytology.
1) NARES - Non Allergic Rhinitis with Eosinophils: This sub-type is characterized by >20% of cells being eosinophils on nasal cytology.
2) NARMA - Non Allergic Rhinitis with Mast Cells: This sub-type is characterized by >10% of cells being mast cells on nasal cytology.
With respect to NARNE, avoiding the offending chemical trigger often resolves this condition without the need for medications (for example, chlorine in swimming pools may trigger this response and by avoiding chlorinated swimming pools, NARNE may resolve spontaneously).
Non-allergic rhinitis with eosinophils and mast cells constitutes a new severe nasal disorder. Int J Immunopathol Pharmacol. 2008 Apr-Jun;21(2):325-31.
Nasal cytology: practical aspects and clinical relevance. Clin Exp Allergy. 2016 Mar 24. doi: 10.1111/cea.12730. [Epub ahead of print]