Especially in summer and autumn, when people sweat more, the function of the stomach decreases, and the spleen’s power of transportation is thinner than some, so it is more likely to incur post-meal sleepiness. Some people even have the feeling of post-meal sleepiness immediately after eating, which may be related to the following two factors: 1. Many people like to eat food with high sugar and fat content for lunch, such as steamed buns, rice, pork, or fast food such as French fries, hamburgers, fried chicken. They will stimulate insulin and bile secretion, overwhelming the body’s internal organs, and reduce the oxygen-carrying capacity of the blood, resulting in lower oxygen content in the brain, making people easily sleepy after meals. 2, sleepy after meals, the weight of this situation, with the quality and quantity of food, with the season and temperature, as well as with the body’s biological clock related. Of course, it is also related to the personal habits formed by people in their long life and work. For example, some people sleep more, some people sleep less; some people like to sleep early, some people like to sleep late; some people have developed the habit of napping, so very soon after lunch will think about sleep. For the elderly, due to the existence of varying degrees of cerebral vascular sclerosis and other reasons, the brain blood supply has been relatively inadequate, so sleepiness after meals may be more obvious.