Dizziness and want to sleep after eating is because the gastrointestinal tract needs to digest after eating, so the blood supply of oxygen to the gastrointestinal tract will increase, and the human blood flow will be more distributed to the gastrointestinal tract. At this time, the overall blood supply to the brain will be in a relatively short state, because the blood will flow more to the gastrointestinal tract, so people will feel a little dizzy, sleepy, want to sleep, which is a relatively normal physiological reaction. This is the same reason why it is not recommended to exercise or take a hot bath immediately after eating, also because if the blood is distributed to the gastrointestinal tract, and then go to exercise or take a bath, the blood supply to the skin and muscles will increase, and the blood will be distributed to the skin and muscles to supply, and then other parts of the body will be more severe ischemia, such as the brain or heart, which may have a negative impact on patients who have other organ ischemia. The effect may be detrimental to patients with ischemia in other organs. Therefore, the dizziness and desire to sleep after eating is mainly a problem of blood redistribution.