What's wrong with wanting to sleep after dinner?

After each meal, the workload of the gastrointestinal tract will multiply, causing a large amount of blood flow into the gastrointestinal vessels. This increased blood flow is transported from other parts of the body, and a large part of it comes from the blood supply of various parts of the brain. Therefore, various parts of the brain are undersupplied, and various parts of the brain are undersupplied. Therefore, brain cells are undersupplied with oxygen and oxygen. The brain then exhibits mild blood supply deficiency, anoxia, hypoxia, and sleepiness, and if people develop a habit of wanting to rest after eating, brain cells can easily switch from an excited state to an inhibited state, making it easier to fall asleep. In addition, there is also a pathological state, that is, suffering from atherosclerosis, hyperlipidemia, hyperglycemia and other diseases causing increased blood viscosity, blood circulation obstruction, this part of the people are more likely to increase blood viscosity after meals, resulting in insufficient blood supply to the brain, so showing drowsy symptoms.