It is a normal physiological phenomenon to want to sleep after eating, which is roughly considered to be related to the following reasons: mainly because after eating a large amount of food, especially greasy food, the gastrointestinal tract needs to work at full capacity to digest food, gastrointestinal peristalsis increases, requiring a large amount of blood supply oxygen, stimulating the parasympathetic nerve hyperactivity. After parasympathetic excitement, the body’s blood will give priority to the gastrointestinal tract to enhance our digestive function, promote the absorption of nutrients and replenish energy, which directly leads to a decrease in the blood supply to the brain. The relative lack of oxygen to brain cells will result in a slowing of blood pressure, heart rate, body temperature, and breathing, leading to sleepiness and drowsiness. It may also be related to the increase in insulin secretion after eating, because the secretion of large amounts of insulin will inhibit the breakdown of proteins and promote the formation of melatonin, making people sleepy. There is no need to worry about this situation, usually eat regularly, eat seven minutes full, pay attention to a light diet.