Why is my skin very red when the weather is hot, very dark when the weather is cold, and relatively white when the temperature is suitable?

When the weather is hot, the outside temperature is higher than the body temperature, and the temperature is easy to accumulate in the body, resulting in active blood circulation. The blood easily penetrates into the capillaries on the surface of the skin, making the skin redder than usual. And it is outstanding when basking in the sun. When the weather is cold, the outside temperature is lower than the body temperature. If you do not keep warm well, the body temperature will easily dissipate, and the blood circulation will be slow. It is relatively difficult for blood to penetrate the surface of the skin, resulting in insufficient oxygen supply to the skin, and the skin will appear to lose vitality. , even purple, which is obvious on the fingers and toes in winter. When the temperature is suitable and the body temperature is similar to the outside temperature, the skin will show a natural color. People with whiter skin will look whiter. From this point of view, the owner of Wutong Tower is a white-skinned person.

o(∩_∩)o...haha