After lunch, the stomach needs to digest and concentrate all the blood in the stomach, and the blood in the brain is relatively less than usual, so it is easy to be sleepy. As well as the effects caused by factors such as personal habits. It is also important to pay attention to the influence of biological clock. People feel sleepy after meals because the blood sugar level rises after meals, which inhibits the neurons in the brain that keep people awake and alert. In addition, it is clinically found that most people with low blood pressure have this symptom of sleepiness after meals. There are also factors such as personal napping habits that can cause symptoms of post-meal sleepiness, and we should also pay attention to the influence of biological clock. In addition, there are also some diseases that can cause sleepiness after meals. When a person eats a lot of food, a lot of blood in the body runs to the gastrointestinal, making the brain ischemic and can make you sleepy, in addition, after the gastrointestinal start working through the nervous system regulation can also inhibit brain activity, you will also feel sleepy. This is a normal physiological phenomenon, there is no need to deliberately adjust it. However, it is better to eat on time and eat less at night before going to bed, so that the stomach can rest for a while. Every day after eating, you will be particularly sleepy, unclear, depressed, and want to sleep. The diagnosis can be confirmed by these. Sleepiness after meals means that every day after eating, you will be particularly sleepy. No special examination items are generally needed for this disease, but in order to exclude some suspicious diseases, routine blood tests, blood glucose tests, brain CT, brain MRI and other examination items can be performed to investigate the disease.