2ndGen-- this is something that we've emphasized with DD-- that with her allergy, SHE is the expert. The buck stops WITH HER. Even with her dad and I. Period.
The reason is a reaction that she had when she was seven, which (in hindsight) clearly involved cardiovascular features, and which out and out FRIGHTENED our allergist. He flatly told me that "this is the kind of reaction that kills people." In front of then-7-yo DD. (In his defense, it wasn't like 'you could die' was news to her, btw.)
Still, under-reporting symptoms has been a chronic problem for her. It just is for some kids, I think.
It worries me terribly even now.