1, environmental factors: the temperature is low in winter, especially in outdoor activities, cold air will directly contact the surfaces of hands and feet. Because the hands and feet are far away from the heart, the blood circulation is insufficient, and it is easy to dissipate heat under cold conditions, resulting in a cold feeling.
2, thin body: thin body, the human body stores less energy. When energy supply is insufficient, metabolism slows down to conserve energy and slow down blood circulation. This will lead to insufficient blood supply to limbs (including hands and feet), poor microcirculation and local tissue temperature drop.
3. Anemia: Anemia refers to the reduction of oxygen delivered to tissues and organs due to the abnormal number or function of human red blood cells. When the body lacks enough oxygen molecules, the surrounding tissues will be deprived of oxygen. Fingers, toes and other peripheral areas can feel more obvious cold feeling.