Phantosmia: What causes olfactory hallucinations? - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/temporal-lobe-seizure/expert-answers/phantosmia/faq-20058131
WEBJun 21, 2022 · The phantom smell may seem to always be there or it may come and go. Phantosmia may be caused by a head injury or upper respiratory infection. It can also be caused by aging, trauma, temporal lobe seizures, inflamed sinuses, brain tumors, certain medications and Parkinson's disease. cigarette smoke · none
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