I'm going through a pretty bad flare up at the moment and one of the weirdest symptoms I'm getting is that every single time I eat something, within a half an hour, I start to feel a whole lot fever/chills sensations all over my body. I don't actually have a fever, but it just feels like I do. My hands and feet get really cold, my head starts feeling strange, I start feeling very nervous, my vision gets a little blurry, and I just feel really unwell and slightly nauseous. This has happened to me once before about 3 months ago, but it passed in a week or so. At first, I suspected that it was something in particular that I was eating, but its not the case. Even after eating just plain white rice, which almost everyone on the planet can tolerate, I still get the sensations. The only thing that seems to make a difference is the amount of food I eat...the less I eat at one time, the less it affects me. I tried taking advil to calm down the feelings and it doesn't work. Has anyone else experienced this before? What do you think causes this?