It's very cold. I feel cold when I first go to bed every day, and it takes some time to warm the whole quilt. Some people, even with thick quilts, can't reach their frozen feet. In this case, there are usually more women than men.

People in this situation are prone to peripheral vasospasm. When they encounter cold air or cold water, the blood vessels in their hands and feet contract, the blood circulation is not smooth, and their hands and feet are easy to get cold and purple. In addition, it may also be because the sympathetic nerve function is not good, which leads to the inability to tighten muscles and produce heat and cold resistance when it is cold.

The human body temperature is kept between 36 and 37 degrees Celsius. When human skin comes into contact with external temperature, it will be directly transmitted to the life center of the brain, which controls breathing, heartbeat and body temperature. When the weather is hot, the body temperature control center will dominate the excitement of sympathetic nerves, making the skin capillaries and sweat pores open to dissipate heat and sweat; When you feel cold, sympathetic nerves will cause shivering in all parts of limbs, including muscles near the jaw, which will make muscles and fat cells generate heat energy due to contraction and resist the chill. This is why people will tremble when they feel cold.

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.

Women are afraid of cold, make up some iron.

Generally speaking, women are more afraid of the cold than men. Not long ago, two experts from an American institute of human health conducted a group experiment on female volunteers. The experimental report found that people with low cold tolerance have obviously insufficient iron content in their blood. The main cause of iron deficiency in women is menstruation, which leads to a large loss of iron.

As we all know, iron is an important raw material for producing hemoglobin, which is the main functional substance in red blood cells and is responsible for the transportation and metabolism of oxygen in the body. Iodine and tyrosine are the main raw materials for making thyroxine. Iodine needs to be continuously ingested from food, while tyrosine is generally synthesized by itself in the body. Long-term iodine deficiency will affect the synthesis of thyroxine and reduce the body's ability to keep out the cold.

How can I warm my hands and feet?

● Soaking hands and feet locally with hot water before going to bed can not only promote the circulation of vascular endings, but also help sleep.

● After bathing or soaking in hot water, put on socks to keep warm immediately after drying.

● If women are often afraid of cold feet in winter, they can put hot water, rice wine and ginger slices in a bucket (the ratio of hot water to rice wine is 1: 1). Watching TV or getting off work in winter helps to improve women's fear of cold.

Exercise is not afraid of the cold.

When the weather is cold, if you eat more and exercise less, it is easy to accumulate excess fat in your body. At this time, you can do more exercise, which can not only consume excess fat, but also strengthen blood circulation and warm your body.

What to eat is not afraid of cold.

Choosing warm food or medicinal materials for tonic in winter can make the body's blood circulation smooth and qi and blood active, which can achieve the effect of keeping out the cold. Foods with warming function are generally red and sweet foods, or spicy condiments and foods. These foods have the functions of warming, nourishing and promoting metabolism. Warm food suitable for winter.

Meat: mutton, beef, shrimp, sea cucumber, oyster, eel, venison, chicken liver and other meat rich in lipids and protein.

Fruits and vegetables: leek, perilla, green pepper, mustard, cabbage, pepper, onion, pumpkin, litchi, peach, longan, onion, ginger, garlic, etc.

Others: brown rice, sorghum, sesame, nuts, cashews, walnuts, chestnuts and other drupe foods.

When cooking or eating cold food, you can add some spicy spices such as onion, ginger, garlic, pepper, pepper, ginseng, astragalus, dried tangerine peel or Chinese herbal medicine to blend. For example, if you eat cold crabs, you can fry crabs with hot ginger to reduce the coldness of crabs. Common cold foods are loofah, wax gourd, celery, cucumber, kelp, frozen watercress, cabbage and so on. When cooking, you can use appropriate seasonings such as onion, ginger and garlic to achieve the effect of neutralizing the cold. In addition, you can also use Lycium barbarum, red dates, ginseng, longan pulp or ginger to make tea, which can also play a role in keeping out the cold.

Medicinal diet warms the body and mind in winter.

[Danggui Boiled Eggs] Ingredients: Danggui 10g, 2 eggs, and appropriate amount of sugar. Practice: decoct Angelica sinensis in water to remove residue, beat in eggs and cook, and add sugar. You can eat on an empty stomach in the morning. Function: nourishing yin and enriching blood. Angelica sinensis is an essential medicinal material for enriching blood and activating blood, while eggs nourish yin and enrich blood. The combination of the two has a good blood-enriching effect. Treatment of blood deficiency can not nourish the skin, and skin numbness, chills and itching caused by meridians. [Huangqi Jujube Porridge] Ingredients: 20 grams of Huangqi, 20 grams of jujube, 50 grams of white rice, and appropriate amount of sugar. Practice: decoct Radix Astragali in water to remove residue, then add jujube (removing core), white rice, porridge, and then add sugar. Function: supplementing qi and deficiency. In the prescription, Astragalus membranaceus can replenish qi and consolidate exterior, jujube can tonify spleen and stomach, and japonica rice can tonify middle energizer, spleen and stomach. Can be used for breakfast for people with qi deficiency and numbness of hands and feet.