On the problems of human body sensation

It's cold, but it's not enough to turn on the air conditioner immediately. Every night when I first go to bed, I feel the quilt is cold, and it takes some time to warm the whole quilt. Some people, even if they are covered in thick quilts, can't reach their frozen feet. There are usually more women than men in this situation.

People with this condition are prone to spasm of peripheral blood vessels. When they encounter cold air or cold water, the blood vessels in their hands and feet contract, and the blood circulation is not smooth, so their hands and feet are prone to 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 to produce heat and cold resistance when cold.

People's body temperature is maintained between 36 and 37 degrees Celsius. When the skin of the human body comes into contact with the outside temperature, it will be directly transmitted to the life center in the medulla oblongata, which controls breathing, heartbeat and body temperature. When it 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, the sympathetic nerve will cause shivering in all parts of the limb, including the muscles near the jaws, so that the muscles and fat cells will generate heat energy due to contraction and resist the chill, which 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 the 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 are not necessarily less afraid of cold, but may be more afraid of cold!

Some diseases will affect people's inadaptability to cold and heat. For example, patients with hyperthyroidism have excessive metabolism due to excessive excitement of sympathetic nerves, so they are quite heat-intolerant. 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 people who smoke for a long time. Because of the lack of oxygen in the body, the peripheral capillaries are easy to circulate poorly. When the arteries are blocked, they are easy to feel cold. However, if the vein microvasculature is not smooth, although there is no special feeling of being afraid of cold, the blood vessels can not expand and the blood can not circulate, resulting in local hypoxia, and the hands and feet are prone to cold.

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

women are afraid of cold, so take some iron

Generally speaking, women are more afraid of cold than men. Not long ago, two experts from a human health research institute in the United States conducted a grouping experiment on female volunteers. The experimental report found that people with low cold tolerance had 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 transport 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 the body's ability to keep out the cold will also be reduced.

How to warm 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 often have 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). In winter, when watching TV or after work, it helps to improve women's fear of cold.

Exercise is not afraid of cold

When the weather is cold, eating too much and exercising too little makes it easy for excess fat to accumulate in the body. At this time, you can do more exercise, which can not only consume too much fat, but also strengthen blood circulation and warm your body.

What to eat is not afraid of cold

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

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

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

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

when cooking or eating cold food, you can add some hot seasonings such as onion, ginger, garlic, pepper, pepper, ginseng, astragalus, dried tangerine peel or Chinese herbal medicines to blend. For example, when eating 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, etc. When cooking, you can use appropriate amount of onion, ginger, garlic and other seasonings to achieve the effect of neutralizing cold. In addition, wolfberry fruit, red dates, ginseng, longan pulp or ginger can also be used to brew tea for drinking, which can also play a role in keeping out the cold.

winter medicated diet warms the body and mind

[ boiled eggs with angelica sinensis] Ingredients: 1g of angelica sinensis, 2 eggs, and appropriate amount of sugar. Practice: decoct angelica in water to remove residue, beat in eggs and cook, and add sugar. Can be eaten on an empty stomach in the morning. Function: nourishing yin and enriching blood. Angelica sinensis is an essential medicine for enriching blood and promoting blood circulation, while eggs nourish yin and blood. The combination of the two has a good blood-enriching effect. Treating blood deficiency can not nourish skin, numbness, coldness and itchy skin caused by meridians. [Huangqi Jujube Porridge] Ingredients: 2 grams of Huangqi, 2 grams of jujube, 5 grams of white rice, and appropriate amount of sugar. Practice: Radix Astragali is decocted in water to remove residue, then add jujube (removing core), white rice and porridge, and then add sugar. Function: supplementing qi and deficiency. In the prescription, Astragalus membranaceus tonifies qi and consolidates exterior, jujube tonifies spleen and stomach, stem rice tonifies middle energizer, tonifies spleen and regulates stomach. It can be used for breakfast of people with numbness of hands and feet due to qi deficiency.