Haribo, hula hoops and maltesers. 
Until a couple of years ago I'd never had any kind of reaction to food, however a few times Chinese food has made me go very red and itchy and a bit swollen for an hour or so after eating. I'm not sure what exactly it is though as I often get the same thing and sometimes I'll react, other times I won't.
And now chocolate, crisps or sweets? seems a bit random. Always been fine with those.
Guess I'll have to go to the GP now. 
Anyone else have any experience with this or advice?