Why do you tend to feel sleepy in warm weather?

Spring is warm, flowers are blooming, and the climate is pleasant. The warm weather often makes people feel lazy. Even if they get enough sleep at night, they are still lack of energy and drowsy during the day. This is what people call "spring sleepiness".

Spring sleepiness is not a disease. It is a short-term physiological phenomenon in which the human body's physiological functions are adjusted accordingly with natural seasonal changes and temperature changes. In winter, in order to adapt to the cold environment, the human body protects the body temperature and prevents heat dissipation. The skin and capillary blood vessels are in a state of tension and contraction to maintain the body's physiological homeostasis and the central nervous system's exciting information increases, so the human brain is relatively clean. In spring, when the temperature is moderate, the microtubules of the skin and muscles are in a relaxed and relaxed state, the blood flow is slow, the blood supply to the body surface increases, the blood flowing into the brain decreases accordingly, and the excitatory stimulation information of the central nervous system weakens, resulting in the desire for drowsiness. The "spring sleepiness" phenomenon of sleeping.