It's hot and sleepy

In summer, the temperature is high, the skin is rich in blood circulation in order to dissipate heat, so the blood supply to the brain is insufficient, and it is easy to be awake and sleepy; Muscle and blood are also insufficient, and I feel weak. On the other hand, muscle movement generates heat. In order to keep the body temperature not too high, a series of complex neuromodulation will relax the muscles and will not produce heat, so the whole body is weak. Not only people, but almost all animals are like this. Look at the lions in the animal world. They never hunt in the hot sun. They all slept in the shade until dusk. This is conducive to the self-preservation of life.

In summer, the humidity is high and the air circulation is slow, so it is difficult for people to sweat in this climate, and it is easy to have symptoms such as listlessness and drowsiness.

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.

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.