Why is it easy to get sleepy when the weather is warm?

Bloom is warm in spring, with pleasant climate and warm weather, but it often makes people feel lazy. Even if they get enough sleep at night, they are still depressed and sleepy during the day. This is what people call "spring sleep".

Spring sleepiness is not a disease, but a temporary physiological phenomenon that human physiological function is adjusted with the change of natural seasons and temperature. In winter, in order to adapt to the cold environment, protect the body temperature, prevent the heat from emitting, the skin and tiny blood vessels are in a state of tension and contraction, maintain the physiological constant temperature of the body, and increase the excitement information of the central nervous system, so the human brain is relatively clean. In spring, the temperature is moderate, the skin and muscle microtubules are in a relaxed state, the blood flow is slow, the blood supply to the body surface increases, the blood flowing into the brain decreases correspondingly, and the excitatory stimulation information of the central nervous system weakens, so the phenomenon of "spring sleep" appears.