It happens mostly with vinegar...anything containing it. ketchup, mustard, salad dressing, pickles...anything. sometimes it also happens when i eat dark chocolate. it is so disgusting. i can actually feel myself starting to sweat. my forehead gets completely soaked. i love things with vinegar in them and eat them all the time, but its to the point that i can not eat these things in public because my face will be too sweaty and i will look disgusting...i know this is weird, does anyone else have it?