Originally Posted by
Yosemite Sam
interesting one - the wife has cold induced anaphylaxis (I think it might be called cold urticaria?) - has to wrap up warm on runs and take antihistamines before exercising.. a few times she's forgotten to take an antihistamine, or the weather has closed in on a run ie got colder and she's had hypovolaemia and nearly keeled over running... gets a classical urticarial type reaction to boot.... we thought it was caused by inhaling some antigen or other whilst running, but its weather dependent