The symptoms of sleepiness after eating are caused by the following reasons: First, sleepiness after eating may be caused by weakness of the spleen and stomach. Patients with a weak spleen and stomach have to spend more qi and blood to help the intestines digest and absorb the food, thus causing a decrease in the supply of qi and blood to the brain and making them sleepy after eating. Second, sleepiness after eating may be due to excessive intake of high-fat, high-sugar foods. High-fat, high-calorie food will be hoarded in the human intestinal tract for a long time, so that people do not feel hungry for a long time, and the human body due to exogenous food leading to a rise in blood sugar, which leads to a temporary imbalance of insulin and glucose in the blood, prompting the human body to appear sleepy symptoms after eating a meal.