Why do you always feel sleepy when you go to work in the afternoon when the weather is hot?

In summer, because people go to bed late and get up early, there are many parties and lack of sleep. After studying and working all morning, they may feel tired, lack of oxygen in their brains after meals, and naturally want to doze off at noon. In addition, during the day, the temperature is high, sweating is much, and physical exertion is too large. In addition, at noon, the hot sun is in the sky. At this time, human blood vessels dilate and blood supply to the brain decreases, so people often feel depressed and sleepy. Due to the hot and humid climate in summer, it is easy to damage the spleen and cause spleen deficiency. At the same time, there is a theory in Chinese medicine that the spleen and stomach are exterior-interior, which means that the relationship between spleen and stomach is the closest, and some symptoms of spleen and stomach weakness appear, such as dozing off. After eating, the blood sugar rises and the blood supply to the brain is insufficient, so you will feel sleepy. Some people can't completely adjust their biological clocks because of the seasons, but they are prone to anger and irritability due to heavy work pressure, and their ability to adapt to seasonal changes is poor, which leads to psychological adjustment, but this is a rare example. There is also a certain relationship between hyperhidrosis and sleepiness in summer, but this situation mainly occurs in the harsh high temperature working conditions. The human body sweats a lot and loses a certain amount of potassium, which leads to electrolyte disorder, which affects the normal operation of the human body and makes people feel tired and weak.