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.