Nonallergic rhinitis is characterized by sporadic or persistent perennial nasal
symptoms that do not result from IgE-mediated immunopathologic events. This
reference distinguishes between allergic and nonallergic rhinitis and spans
methods to effectively identify, diagnose, and treat these conditions. This
source also spans possible causes of nonallergic rhinitis such as fumes, odors,
temperature, atmospheric changes, smoke, and other nasal irritants.