Hi there, Wallace123. This is such a great topic. Thanks for bringing it up! I know that I've definitely experienced both the hot flashes and the cold, clammy feeling after eating foods that trigger my IBS symptoms. It feels like a sudden rush of the flu, doesn't it? Out of curiosity, what have your doctors told you about this? We know that nausea is a common symptom of IBS, which explains some of it, but I'd love to learn more if you're willing to share what you've learned. Hang in there....I try to tell myself "this is temporary" when I'm having the worst flare-ups. I hope this helps. Becky, IrritableBowelSyndrome.net team member