Why do feet affect their body temperature so much?

For example, you are covering the blanket and feeling the heat, you just need to put your foot out and the temperature is perfect again. Or if you are feeling cold, then wearing socks will see your body warm up immediately.

Here is the answer from Professor Jim Cotter, University of Otago:

"It is true that the foot has a great effect on body temperature, especially in sleep.

For some reason, the foot helps us to keep the body temperature stable.

Just like the hands and feet have a large surface area as well as specific blood vessels that are only open to allow large amounts of blood to pass through, so they release heat faster when needed. When not needed, these blood vessels will shrink.

If it is too cold, the foot will activate receptors that feel pain, which is uncomfortable.

This, in addition to the hands and feet, are located at the end of the limbs as well as no muscle (radiant muscles), resulting in their temperature dropping faster than elsewhere in the body.

So, by using specific nerves controlled by the thermostat in the brain, we can almost change the temperature of the foot, so that the body temperature will be adjusted correctly. .

As for "warming up immediately when wearing socks", it is more about feeling than reality (but in some cases it is true).

If it is too cold, the foot will activate receptors that feel pain, which is uncomfortable; so warming the legs will actually bring about clear benefits.

This also relates to the saying, if cold, wear a hat. Because the head loses a large amount of heat when it is cold and it cannot keep its heat forever.

Whether or not we are comfortable with the current temperature is also important.

Wearing a hat has a great effect, both in feeling and in reality, it also makes the thermostat prevent the blood flow to the feet more, so the legs will not be cold and more comfortable. "