Obviously, poor blood circulation may be the main factor. When our blood pressure has corresponding problems, our feet and hands are prone to numbness, such as sitting up suddenly in bed all the time, or squatting on the ground suddenly, which will lead to great changes in our blood pressure, and then it will easily lead to poor blood circulation, oppression of hands and feet, slow blood circulation, and then insufficient nutrition supply, resulting in numbness of hands and feet. This situation will occur in most people, but it will not affect us.
Too much salt and alkalosis may cause numbness in hands and feet. When we eat too much salt, our bodies will be dehydrated. We need a lot of water to dilute this salt, and then the salt will be excreted by water. But beyond a certain limit, our body will have no way to purify these things, which will easily lead to serious alkalosis, which will easily lead to the exhaustion of peripheral toxins in hands and feet, and the color will be different from normal skin, and then hands and feet will be numb. These may be affected by eating the wrong food or eating the wrong way.
It is probably guided by people's subjective emotions. For example, when people are particularly angry, they can't control their bodies and tremble all over. This situation is influenced by hormone secretion in the body. When we are particularly angry, our metabolism is faster, but this sudden acceleration can easily lead to numbness in our hands and feet.