Why do people who freeze to death have strange "happy smiles" on their faces?

As we all know, people are warm-blooded animals. In a cold environment, the body can protect itself from the cold. However, if the cold lasts too long, you will experience a terrible time. From the first few minutes, your limbs will feel stiff, and in the last few seconds before you die, you may die with a "happy smile".

1. Blood contracts when it flows in capillaries.

In cold weather, your body will give priority to keeping the internal organs warm.

At this time, your limbs will be colder, because the capillaries near the surface of the skin will contract blood and flow to more important body organs.

Your heart rate and breathing rate are increasing.

Limb blood flow restriction is just a reaction of sympathetic nervous system. Other symptoms include rapid heartbeat, shortness of breath and high blood pressure.

3. You are starting to tremble.

Trembling is a way for the body to generate extra heat by rapidly contracting muscles. Mild hypothermia is characterized by severe shivering.

4. You begin to fade.

As blood flows from the surface of the body, the skin becomes whiter and whiter, which is the beginning of frostbite.

5. Decreased heart rate and respiratory rate.

If you don't get help at this time, the increase rate of heart rate and respiratory rate will stop.

When severe hypothermia finally appears, your heart rate and breathing rate will drop sharply.

6. Strange phenomenon: happy smile when you die

As the blood supply to the heart decreases and the brain is deprived of oxygen, hallucinations will occur.

At this time, you may "see" a beautiful photo with a "happy smile" on your face, but the fact is cruel, and you may die laughing.

These are the changes your body has experienced in a cold environment. Frostbite limbs are no longer the only thing you need to worry about. The most terrible thing is that when your body temperature is too low, your body will make you feel very hot, which will lead to more strange phenomena.