Warm sensation after eating lunch?

also, why is that everytime  I eat something, i get a warm sensation in my body. From there, my skin flushes easily during the day, etc...Eyes also get kind of heavy and reddish after eating. Not sure why this happens? Weird. BUt during morning at work i feel good. THen after lunch, i feel warm in face and body off and on. Always after lunch. Not sure why???What could cause this?