Depends on the cause: Unlikely to be an environmental allergy with no improvement on nasal steroid or antihistamine. Potential causes of nonallergic rhinitis include infection possibly with immune deficiency, irritant sensitivity, systemic diseases such as autoimmunity, inflammatory syndromes with or without nasal polyps, medication side effect, structural abnormalities, tumor, or dental problems (to name a few).
Answered 10/23/2017
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