sounds like you are having a food allergy. also sounds like the hot flashes from niacin. are you taking any b vitamins?
body turns bright red and burning sensation then sever itching as fast it comes on it goes away but may linger. sometimes i can be very relaxed talking to someone in a chair and they look at me and ask why are you turning bright red and it comes all over my body and i feel like my body is on fire like a severe sun burn and then major itching comes all over it lasts sometimes a min or two or it will last for 30 minutes and i have to scratch to get relief but i have no nails and i scratch until skin starts to come off that is how hard it itches doctors say it is from stress but i am relaxed why