What's wrong with shivering in winter?

shivering in winter is a natural reaction of the body because it is too cold.

shivering is a function of the human internal environment control system. There is a tiny brain tissue behind the eyes, called hypothalamus, which is responsible for controlling body temperature. Trembling is a way for the hypothalamus to keep the body at a constant temperature. When the body gets cold, shivering can release energy. On the contrary, shivering can make people sweat when the body gets hot.

Other tremors:

When a person has a fever, the signal from the hypothalamus will further heat the body, thus trying to kill harmful germs.

here's how this process works: the body contracts the subcutaneous blood vessels close to the skin, while other blood vessels relax, allowing blood to flow to the infected site. The blood is therefore far away from the outer surface skin, so you will feel cold. In order to replenish calories, the thyroid gland will start to contract muscles, which will lead to shivering.