Anaphylaxis cannot be introduced by exercise. It could be something your ingesting, or applying I.e sunscreen.
Hives?

Throat swelling vs constriction are two different things. Stuffed nose is not a anaphylaxis symptom.

Somethings in the environment causing you body to trigger this response.

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Please forgive typo's and poor grammer. Most posting performed on my not so smart phone.

He means exercise induced asthma, I'm guessing.

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"Go yell at an M&M"

A rare, but well documented condition. The underlying etiology is often difficult to ascertain. There's some good evidence that it can be related to timing of eating and what you eat before exercise, but not always.

Sounds like you need to see a specialist for more of a work up. Given the treatment you required you should probably have an epi-pen with you when exercising, at least until you get this worked out.

To the other replies: definitely different than exercise induced asthma. Not always an exposure to air/environment. "Stuffy nose" is related to histamine release and part of condition. Throat closing/swelling are subjective descriptions of restrictive airway and can mean any number of things, but should not be taken lightly.

Bottom line is this can be a very serious condition and needs further eval. Go see a sports doc or allergist. If they don't take the exercise induced anaphylaxis idea serious, then find someone else.

This.
It ithces like hell, all the skin swells, I fainted once, and almost fainted 2 more times - in my case it seems related to eating. I stick to stuff I know if I'm training after, and I don't eat 2-3 hours before excercising.
I pay close attention to my body now, and if I feel things aren't ok I just stop- usually it starts with some red spots and itching.
Also I second the epi-pen suggestion, although I don't always carry it, but I do have Claritine on me all the time - and if I stop quickly and take it on the spot it usually does the trick (still takes about an hour for the swelling to go down, but I got used to it...)

I've had my throat swell up twice and find it difficult to breath after one specific race, no other races, was Auckland 70.3

Did u have any follow up investigations done?

x2
Worked with Drs for diagnostic testing of different 3 athletes with suspected exercise induced anaphylaxis.

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my wife has it.

diagnosed in 2008 while we were dating in college. she fainted at a local 10k and fainted during a training run.

It was due to her diet, something she was eating pre workout.

now she knows the symptoms and hasn't had an issue since. she carried a epi pen for several years but doesn't anymore.

I was diagnosed with exercise induced anaphylaxis in 2007. 1st time after a run.... the next 2 put me in the hospital. It gets worse each time and is dangerous.

My GP diagnosed it and I followed up with a great allergist who has seen it in other athletes.

I find it happens with hard efforts....

I knew what I had eaten at each eposode (thinking it was food related). He said it wasn't the food.

I wear a Road ID with my medical history.... My allergist has me take an Allegra 180 at least 30 min prior to any exercise. This works for me. I have an inhaler for longer races... exercise induced asthma came with it.... they are 2 different things... I have 2 epi pens (which I have not needed since taking the Allegra)... and I keep those and benedryl on hand in case. I take these with me to races.

I also let new training partners know... just in case.

I have been able to control it (luckily) in all distances of triathlon and up to 50 Ks ... some people can't get it under control... I hope you can!

sorry, only saw this now. no, i didn't. but have had something similar happen to me again after a ride. hasn't happened again though.