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Every time I am about to board a jet plane (your standard Boeing 737 for example) I am hit with instant debilitating nausea while inside the boarding ramp. (That enclosure that connects the aircraft with the terminal.) I believe it has something to do with the air inside the plane since it only hits once I can smell that distinct odor that the inside of jet aircraft have.
This extreme unpleasantness lasts for about 20 minutes upon boarding and gradually decreases. For the rest of the flight I am fine although occasionally I will get small hints of it.
I have flown single engine prop aircraft (Cessna 172) and this never happens around them.
If anyone knows what this is and how I can stop it I would be eternally grateful. It has made traveling by plane extremely unpleasant.
It sounds as though you're developing a conditioned response or allergy to some smell of the aircraft insides. Insecticides are used in some international flights but this is prior to disembarkation, and should have cleared by the time you embark. If it's linked to a particular airline, it may be the air freshener they use, and as your flight proceeds, the internal air recirculation systems scrub the air of it. So, you could ask the airlines if they all use a particular product.
Perhaps you could try some nasal filters with activated charcoal to scrub the air for you to see if it helps in that first 20 minutes.
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