- An important distinction when diagnosing an olfactory disorder is ruling out other possible causes such as sinonasal diseases, post-infectious disorder and post-traumatic disorder. 
- If the patient experienced symptoms of olfactory dysfunction suddenly, after an illness or trauma, then it is most likely a result of a post-traumatic disorder or post-URTI (post-upper respiratory tract infection).

Ohio State University, Columbus

Healthcare for patients with olfactory dysfunction (ENT clinic) 

Boesveldt, S., Postma, E.M., Boak, D., Welge-Luessen, A., Schöpf, V., Mainland, J.D., Ngai, J., & Duffy, V.B. (2017). Anosmia - A Clinical Review. Chemical Senses, 42 (7), 513-523. http://doi.org/10.1093/chemse/bjx025

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