What Can Cause Phantosmia?Phantosmia is caused by numerous factors, such as:Sinus infectionIntense odor-causing compoundsFlu or coldLoud soundsOther upper respiratory tract infections (allergic rhinitis; chronic rhinosinusitis)Epilepsy Change in airflow through the nasal passageHead injury MigrainesSchizophreniaDepressionParkinson’s diseaseTumors of the brain (multifocal cerebral gliomas) References:Swanson JW. Phantosmia: What causes olfactory hallucinations? Updated Apr 19, 2018; Accessed September 21, 2018; Cited September 24, 2018. - (https://www.mayoclinic.org/diseases- conditions/temporal-lobe-seizure/expert-answers/phantosmia/faq-20058131)Smelling things that aren’t there (phantosmia). Updated Aug 31, 2017; Accessed September 21, 2018; Cited September 24, 2018. - (https://www.nhs.uk/conditions/phantosmia/)PubMed Health Glossary. Phantosmia. Accessed September 21, 2018; Cited September 24, 2018. - (https://www.ncbi.nlm.nih.gov/pubmedhealth/PMHT0028147/)Smell disorders. Updated May 12, 2017; Updated Aug 31, 2017; Accessed September 21, 2018; Cited September 24, 2018. - (https://www.nidcd.nih.gov/health/smell-disorders)Kong X et al. Dysphasia and Phantosmia as First Presentation of Multifocal Cerebral Anaplastic Astrocytomas: Case Report and Review of the Literatures. Schaller. B, ed. Medicine. 2015;94(20):e877. - (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4602886/)Sara Sjölund et al: Phantom Smells: Prevalence and Correlates in a Population-Based Sample of Older Adults, Chemical Senses, Volume 42, Issue 4, 1 May 2017, Pages 309–318. https://doi.org/10.1093/chemse/bjx006Donald Leopold; Distortion of Olfactory Perception: Diagnosis and Treatment, Chemical Senses, Volume 27, Issue 7, 1 September 2002, Pages 611–615, https://doi.org/10.1093/chemse/27.7.611Leopold DA, Loehrl TA, Schwob JE. Long-term Follow-up of Surgically Treated Phantosmia. Arch Otolaryngol Head Neck Surg. 2002;128(6):642–647. - (https://jamanetwork.com/journals/jamaotolaryngology/fullarticle/482912)Henkin RI, Potolicchio SJ, Levy LM. Olfactory Hallucinations without Clinical Motor Activity: A Comparison of Unirhinal with Birhinal Phantosmia. Brain Sciences. 2013;3(4):1483- 1553. - (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4061890/)Landis BN, Reden J, Haehner A. Idiopathic phantosmia: Outcome and clinical significance. ORL J Otorhinolaryngol Relat Spec. 2010;72(5):252-5. - (https://www.ncbi.nlm.nih.gov/pubmed/20714205)Morrissey DK et al. The role of surgery in the management of phantosmia. The Laryngoscope. 2016;126:575-578. - (http://www.sbccp.org.br/arquivos/LG2016-03/lary.25647.pdf) Published on Oct 11, 2018Last Updated on Oct 15, 2018