Locked in petroleum odor,
1st time was working on friends classic car, the smell of petroleum from running it and working on the fuel system left me for 3 months with heavy phantom fuel odor, found black licorice changed it to make eating more comfortable, now every time I get near a complex molecule I get the same issue but lasts a few days, last one was four days, ent doc no answer, maybe a virus damaged your olfactory nerve in roof of nasal was her best guess, D.mg
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@migunner, I wonder if these related discussions might give you some leads as you continue with your research into your issue with smelling petroleum.
– I detect a smell even when it isn't present: https://connect.mayoclinic.org/discussion/i-detect-a-smell-even-when-it-isnt-present/
— Smelling Cigarette Smoke (Phantosmia): What could it mean?: https://connect.mayoclinic.org/discussion/smelling-cigarette-smoke/
Also, see this article from Mayo Clinic
– What are olfactory hallucinations?: https://newsnetwork.mayoclinic.org/discussion/consumer-health-what-are-olfactory-hallucinations/