People tremble when it's cold. Where are they trembling? Do your hands tremble in cold weather?

Hello, describe it according to your situation. It is a self-protection mechanism of the human body, just like the human body will automatically sweat in high temperature weather. In cold weather, the most important thing to live with the cold is to keep the important area inside the body at around 37 degrees Celsius. In order to achieve this goal, our body will use various "tricks": the body will spontaneously adjust the production and consumption of energy in the body to reduce energy consumption and maintain heat in the body; Reduce the blood flow of peripheral skin, thus reducing the heat lost by the body to the environment, which is why these parts (such as hands and feet) have the lowest temperature and catch cold the fastest; Another is that the body will tremble and get hot, which is what people often say. The decrease of skin surface temperature will stimulate nerves to send signals, and muscles will contract violently, resulting in chills. Knowing this, you can shake your legs aboveboard in the office in winter.