The reasons for easy sleepiness after eating may be the following: 1, the redistribution of blood in the body after eating, the gastrointestinal tract and liver need to do more work to digest and absorb food, so some blood will be transferred from other organs to the gastrointestinal tract, resulting in changes in the blood supply to the brain; 2, when the digestive system works, the body temperature will rise because the liver does work, thus inducing sleepiness; 3, people as special creatures, the body exists with a natural circadian rhythm, if the work is carried out in the morning and afternoon, after eating the body will experience a certain degree of exertion, thus naturally producing sleepiness.