Why are some people particularly afraid of cold and have low body temperature?

People are warm-blooded animals, so basically there should be no question of "who is more afraid of cold". At the same temperature, some people may be particularly afraid of the cold because of their different subjective feelings. Of course, the fat layer can isolate the low temperature, but because the effect of fat cells on heat production is worse than that of muscles, people with thick fat may not be afraid of cold, but may be more afraid of cold!

Some diseases will affect the body's inadaptability to cold and heat. For example, patients with hyperthyroidism are quite heat-resistant because of excessive excitement and metabolism of sympathetic nerves; On the contrary, patients with hypothyroidism cannot generate enough heat energy to keep out the cold because of poor sympathetic nerve function.

There are also long-term smokers. Because of lack of oxygen in the body, the surrounding microvessels are prone to poor circulation. It is easy to feel cold when the arterioles are not smooth. However, if the venous microvessels are not unobstructed, although there is no feeling of being particularly afraid of cold, the blood vessels cannot expand and the blood cannot circulate, resulting in local hypoxia, and hands and feet are prone to chills.

Usually, urban "lazy people" who "can lie down and don't sit, but can sit and don't stand" will also have the problem of not being cold-tolerant because of the decrease of basal metabolic rate.