The increase in body temperature after eating is due to the exothermic phenomenon that occurs during the digestion of food, which is normal. Most people eat warm food when they eat, so that the food will not cause irritation to the stomach, but also conducive to digestion by the body. After eating warm food, the stomach will feel warm and the body temperature will be naturally increased. The gastrointestinal system will begin to digest food after it is ingested, and more chemical reactions will occur in the process of digesting food. Some of the food in the process of digestion will also appear feverish, so some people will have a slightly elevated body temperature after eating. After eating the body temperature will gradually return to normal in about half an hour, but after half an hour the body temperature is still in a high state should be alert to the fever caused by the fever, need to deal with the fever.