Why does the body sometimes change from cold to hot, and the fingertips become very numb and hot?

This situation is that you have a heart problem and belong to the constitution of blood deficiency. It's insufficient blood. When the weather is cold, the human body will contract blood to the important parts of the human body-the chest and abdominal cavity to protect the more important organs of the body, so the blood supply will be reduced accordingly when the hands and feet are far away from the heart and unimportant places. In the human body, blood is the carrier of human body volume, so hands and feet will be cold at this time. As the weather gets warmer, the human body will constantly make adjustments. When the lyre is warm, the blood will be released, and the hands and feet will be much warmer at this time. You should pay attention to maintenance! !