Blood donation means, donating more of one's own blood for clinical transfusion.

The total blood volume of a healthy person is about 8% of body weight, and the metabolic activity of blood is very vigorous. The total blood volume of an adult is about 4000-5000 ml. A healthy adult donates 200-400 ml of blood at one time, which accounts for only 5% of the total blood volume of the whole body. The body will automatically regulate the blood flow to return to normal very soon after blood donation, and it will also stimulate the hematopoietic function of the body. Normally 80% of the blood circulates in the heart and blood vessels to maintain the normal physiological functions of the body.

You should also take rest and strengthen your nutrition after donating blood. Don't donate too much blood at one time, and don't donate blood too often. Otherwise, the title should be changed to whether blood donation is harmful to the body.

Donating blood can be more significant in saving someone's life in a crisis than it is for your health. However, there are also health benefits to donating blood.

Whether or not blood donation is beneficial to health. Currently, in the mainstream, there are three health benefits of blood donation:

1. Blood donation has good long-term effects on the cardio-cerebral vascular system: it can prevent and alleviate blood viscosity and reduce the occurrence of cardio-cerebral vascular diseases.

2. Frequent blood donation can improve hematopoietic function: after blood donation, due to the decrease in the number of blood cells, it has a stimulating effect on the bone marrow, prompting the release of mature blood cells in the bone marrow reserve and stimulating the hematopoietic tissue of the bone marrow, which prompts the generation of blood cells, and by donating blood frequently according to the specified deadline, the bone marrow can be kept in a vigorous state of vitality.

3. Can promote and improve mental health: a large number of studies have shown that healthy emotions can be communicated through the nervous, body fluids, endocrine system of the brain and other tissues and organs, so that they are in a good state, is beneficial to the enhancement of human immunity, resistance.

To say that giving blood is good for your health is something I disagree with.

In the early years, there was a great deal of resistance to publicizing blood donation. Many people, influenced by traditional beliefs, thought that blood donation would damage one's inner "essence" and "qi". So there are many scientific articles saying that blood donation is not harmful to the body, on the contrary, it can promote the hematopoietic function of human beings, promote blood circulation, reduce the viscosity of the blood, and so on. Among themThe first half is right, the second half is subjective.

The total amount of blood in the human body is about 8% of the body weight, which is about 4,000-5,000 ml. Generally speaking, a donation of 200 ml, or 5% of the total amount of blood, will not be noticeable to the human body. (The maximum amount of blood to be donated at one time is set at 400 ml, which is within 10% of the total amount, and this is a relatively safe range.)

In a natural state, a person's red blood cells only live for about 3 months, and the blood cells are all constantly being renewed. Therefore, the blood you lose can be quickly replenished through the hematopoietic system. But hematopoiesis also needs raw materials, so you also need to pay attention to eat slightly more lean meat, pork liver, pork blood and other foods to supplement protein and iron.

I have donated blood in college and after I started working. After each donation, I felt drowsy for a few days, perhaps because I always stayed up late, so my body functioned relatively poorly.While I don't believe that donating blood will bring any physical benefits, I firmly believe that I have nothing to lose either. And it's a good thing that saves lives, so why not go along for the ride?

In earlier years, there was also "bloodletting therapy" in the West, which was said to be able to cure certain diseases. Even now, many people in China still believe in it. Some people feel refreshed and significantly better after bloodletting, probably due to the increase in adrenaline, or at least the placebo effect. I would like to say to this person in the picture below, you have this energy, go and donate blood a few more times how nice.

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I see this problem, I can not help but tell you, now I have poor health so lazy don't want to type so many words, in order to tell you really to my tired also want to confess the experience.

Ten years ago, working in Shenzhen, in Huaqiang North to see the honor of blood donation, good for the body, think about can save lives, so do not think so much to go in to the check, a check of O-type blood, and I do not smoke and do not drink alcohol blood is fully qualified to see the big needle is afraid, donated 400cc, looking at their own blood out of the blood feel very proud of the dedication of the doctor after giving me a small red ball of love. As the body was really very very strong at that time, I did not feel any discomfort within a few days, and slowly passed. Later over more than half a year passed the original blood donation place and see the blood bank emergency, I do not hesitate to go in, and then donated 400cc, so I have donated a total of four times, due to the body good blood donation body is not a time to feel out of a lot of impact on the body, but recalled that the body is still not as good as it used to be, and get up in the morning cock is not as hard as it used to be, and sometimes I will not be hard, anyway, the overall did not have a former There is vigor, the face is also a little yellow, of course, at that time, working meals are not so good, at that time, I think blood donation is so beneficial to think that the food is not very good caused by not think too much about it. The last time to donate blood and friends to go to Huaqiang North to stroll through the electronic city passed by that and see the blood, and friends went in, a check and qualified, the doctor asked me to offer machine blood, I said that a dedication can be remembered 800cc, of course, think about it on the promise to donate blood during the period of time it is obvious that the lips are particularly numb, I gave me to drink a small bottle of liquid calcium to see the blood out of the dedication of the blood I realized that it is in my body to extract extract the essence of the blood. That night I felt cold, that time in Shenzhen in June is particularly warm, I was regretting it, because it was still working and nothing to make up for, so slowly past, and the body day by day worse, slowly on the body is so tired ah, the night is not good to sleep, can not get up in the morning, and sometimes a runny nose, and in the morning and no longer a pillar of the sky, slowly on the body of a variety of problems are beginning to come, the body The body is not good, people also become more and more lazy, the body is almost forty years old body, although people are still very childish. Of course, there are all kinds of problems also slowly come, I am now 33 years old, the body is particularly poor, eat antler also no reaction, how to make up are not up,. Think about the previous snow do not have to wear socks now regret ......

I urge everyone to be nice! I lie about being a small dog big dog all the time.

Since 2001, when I was studying in Shenyang, I have been donating twice a year, from 200 at the beginning to 400 (occasionally forgetting). Until 2013 when something happened, I only donated twice. I remember that is in the city of Lishui blood donation house, I went to donate blood, asked to take off their shoes, and then the blood donation process, the blood collector's friends no less than three people, it, come and go are not shoes, and the blood collector simply ignored you. And then out of the car also illegal parking was sticker.

Then there is this year in June the phone call to say there is a souvenir to go to Jinyun take, I am pot town people, there are more than thirty kilometers, I itself does not matter to take or not to take, to the September when it happened to pass by the blood donation house, by the way to go and get it, just so a certificate, and the time is still in 2012! How efficient they are! Something from 2012, shouting at you to pick it up yourself in 2016! Courier's a few bucks to save too! As if I'm so rare for this spiritual reward. I have doctor classmates too, and I know it's not good to donate blood, but I enjoy the feeling that my blood can help someone else, that my blood is flowing in the body of someone who needs it. And then so two things, I stopped giving blood and will never give again unless someone is in dire need and knows who my blood is used for.

The statement that "proper blood donation is good for health" is, at the very least, a very loose one; blood donation is primarily beneficial to the recipient and is an act of giving. For most people, donating blood on a regular basis is not detrimental to health, but it does not improve it.

For donors, there are several benefits to donating blood, but all have certain prerequisites.

Donating blood helps to detect health problems and hidden dangers because when you donate blood, you have to undergo a simple medical checkup and have your blood tested for everything from high blood pressure to hepatitis, HIV, etc. If you never undergo a medical checkup, you may be able to find out about problems that you don't know about, and even if you undergo medical checkups year after year, a condition like HIV infection can't be detected. But if one is a healthy person, nothing will be found.

Reducing iron levels, some people have too much iron in their bodies, which can be reduced by donating blood and is good for the body, provided the iron is in excess. Some people do not have enough iron, and before donating blood, they should eat iron-rich foods so that they do not develop iron-deficiency anemia after donating blood.

Calorie consumption, a blood donation can consume 650 calories, of course, can not replace the exercise, and it is impossible to lose weight by donating blood, can only be counted as a little benefit along with the donation of blood, but if you donate blood after eating a big meal, this benefit does not exist.

It makes one feel good mentally and it is honorable to donate blood because helping others and doing such a noble thing makes one feel good and contributes to one's mental health, and this is the main and most common benefit of donating blood, but you have to have the love for it. If there is some compulsion to donate blood, you won't get this benefit.

Blood donation is safe if the process is properly sterilized. On the flip side, if there are problems with the sterilization of the blood donation process, consequences such as infection can occur, so it is important to make sure that blood donations are safe, including the use of disposable medical equipment.

Some side effects of blood donation, such as dizziness and nausea, will disappear within three days. Proper blood donation has no long-term adverse health effects and is a worthwhile act of public decency.

The blood volume of human body accounts for 8~10% of body weight, and a single blood donation of 300~400 ml only accounts for 5~10% of the total blood. After blood donation, the blood stored in the liver, spleen and other organs can replenish the blood circulation in time, restoring the blood volume in the blood vessels; at the same time, the organism stimulates the hematopoietic organs to speed up the manufacture of new blood, and the blood can be replenished in a relatively short period of time. Therefore, donating blood on time and in quantity will not affect the health of blood donors.

Physical effects of blood donation

01. Blood donation promotes mental health.Numerous studies have shown that healthy emotions can communicate with the brain and other tissues and organs through the nervous, body fluids, and endocrine systems to keep them in a good state, which is beneficial to the improvement of human immunity.

02. Blood donation can boost metabolism.After blood donation, the human bone marrow hematopoietic system is constantly stimulated, which makes the hematopoietic function more vigorous, promotes the metabolism of the body, and produces young cells with more vitality, which is more conducive to health.

As we all know, bone marrow is the most important hematopoietic organ, and the hematopoietic function and the rate of hematopoiesis gradually decline with age. After donating blood, due to the decrease in the number of blood cells, there is a feedback effect on the bone marrow, prompting the release of mature blood cells from the bone marrow reserve and stimulating the bone marrow hematopoietic tissues, prompting the generation of blood cells. Regularly and appropriately donating blood can keep the bone marrow vigorous, and the energy of the person will be maintained in abundance.

03. Blood donation can prevent cardiovascular diseases.After donating blood, the blood lipids and cholesterol in the blood are subsequently reduced, lowering the blood viscosity, which serves to dilute the blood, make the blood flow faster, and improve the blood supply to the heart, brain and other organs.

Due to the lowering of blood lipids and cholesterol, the blood flow is accelerated, and the fats, heavy metals and other substances in the blood are not easy to be deposited and adhered to the walls of blood vessels, which can prevent the decline in the elasticity of blood vessels and hardening, and play a role in the prevention of high blood pressure, thrombosis, and cardio-cerebral and cerebral vascular diseases.

Special emphasis is placed on the fact that men have thicker blood compared to women because of women's monthly menstrual periods. With age, blood vessels harden and men are more likely to suffer from cardiovascular diseases than women.

Precautions after blood donation

Although donating blood is not harmful to your health, there are many details that should not be sloppy after donating blood.

For example, after donating blood you need to rest, do not get up in a hurry, and apply pressure to the puncture site with a cotton ball for about 15 minutes. If there is bruising around the eye of the needle, applying a hot compress for two or three days will gradually subside.

On the day after blood donation, pay attention to the cleanliness and hygiene of the puncture needle eye, and take a bath in the rain to avoid dirty water contamination of the needle eye to prevent infection. In the 1~2 days after blood donation, eat some high protein and easily digestible food as appropriate, do not overeat, and do not exercise strenuously, rest appropriately. Individuals with tiredness, as long as to ensure adequate sleep, will also disappear soon.

Of course, a very small number of people who participate in blood donation for the first time will experience vertigo reaction. It is characterized by panic, dizziness, pallor, nausea, etc., followed by sweating, after which the face gradually turns red and the symptoms disappear quickly.

There are many factors causing this reaction, some of which are caused by lack of physiological knowledge about blood donation and mental stress; some are psychological factors, seeing others feel dizzy and feeling dizzy themselves; some are sleep deprived; some do not eat before donating blood; and some are over-fatigued. However, as long as proper care is taken, the above mentioned reactions to dizziness will generally not lead to accidents.

What not to donate blood:

These conditions are risky for blood donors, specifically: those who have recently donated blood; those who are underweight or overweight; those who are anemic; those who have various infectious diseases, or are at risk for infectious diseases; those who have malignant tumors or a history of them; those who have a serious chronic disease or autoimmune disorders; and so on.

Also, breastfeeding mothers, especially within 6 months of delivery. This is because it may reduce the iron reserves in the donor's body, creating a risk of iron deficiency in the infant.

Due to the special nature of blood products, they cannot be bought and sold freely in the market, and China has implemented compulsory blood donation to minimize the possible riskiness of blood products. The Chinese tradition that blood is very valuable, and even many hospitalized patients scream when a little more blood is drawn. Patients aside. In fact, for healthy adults, donating 200ml-300ml of blood at a time has no effect on their health, and is even beneficial to their health.

The human bone marrow is the main blood-forming organ, and as we age, the blood-forming function gradually declines. The decrease in blood cells after blood donation has a feedback effect on the bone marrow, which can lead to the release of blood cells and the generation of blood cells, and regular blood donation can keep the bone marrow alive.

Due to the improvement of living standards, high-fat diet and too little exercise, many people's blood lipids are at a high level for a long time, and the fat layer adheres to the wall of the blood vessel, resulting in the reduction of the elasticity of the blood vessel. By donating blood, a portion of the blood is reduced, and then the blood is diluted by drinking water, which reduces the potential danger of arteriosclerosis. Repeated blood donation will make the blood viscosity decrease, which is positive for the prevention of cardiovascular diseases. The biggest benefit of blood donation is the improvement of mental health. Donating blood is a noble act of saving someone's life, and while helping and being kind to others, it also purifies one's spirit and comforts the soul.

Some girls are worried that they will gain weight after donating blood, this worry is superfluous, blood donation does not stimulate hormonal changes in the body, some people donate blood after gaining weight may be felt blood loss, caused by a large number of tonic.

Blood donation is a public welfare issue and a social responsibility that healthy adults should take on. Donating blood can save people's lives and save others' lives, and at the same time, you can get a sense of social identity and fulfillment within yourself. Moreover, if the donor's family members are sick, they can use blood on a priority basis, and blood donors who donate more than 800ml of blood can use blood free of charge for life. In fact, this policy is a self-serving and altruistic policy. Of course, blood donation is, after all, a voluntary matter. One should not induce everyone to donate blood by over-advertising the benefits of blood donation, and one should be able to distinguish between the pros and cons of blood donation after one has fully understood them. Those who participate in blood donation must also be qualified healthy adults, such as 18-55 years of age, weight requirements, blood pressure must be in the normal range, and the interval between blood donations must be more than half a year. I once had a student who participated in a blood donation program at school, but was unable to do so because he was underweight (less than 45 kilograms).

In short, moderate blood donation does not have any effect on the body of healthy adults, and has certain health benefits, but if you are usually not in good health, or have severe bloodsickness, you do not have to be brave enough to necessarily go to donate blood.

I personally donated blood 4 times, 4 years in a row, 2OOCC each time, and from a personal point of view, first of all, surely, donating blood has no adverse effects for me personally.

Every time I gave blood it was Friday morning, took a cab home after the blood center, took two days off, and went to work on Monday, intact and in no state of discomfort!

In the long run, I have been more than ten years without a serious illness, at best, a cold, quite, move, the disease will be cured, the only use of the social security card over the years is the physical examination found pylori roxburghian bacteria, need to be reviewed, and the results of the spending more than 200 yuan, blowing, and did not check out any discomfort!

Therefore, I personally conclude from personal experience that donating blood with the proper frequency is not damaging to human health in the first place, and I am not feeling any signs of unhealthiness!

So, is donating blood good for your health?

First of all, blood donation should help with hematopoiesis.

Although 200CC only accounts for about 5% right of the body's blood, the body will definitely mobilize various systems and organs to adopt emergency mechanisms to start the process of enhancing hematopoiesis, in which the hematopoietic function is strengthened and exercised! It should have a certain effect on the greater perfection and development of the body's hematopoietic function and promote the renewal of blood.

Secondly, it facilitates the renewal and strengthening of other systems and functions. Once the blood system is changed, the other digestive, muscular, nervous and respiratory systems are all mobilized, helping to strengthen and improve them.

Finally, due to the self-confidence generated by blood donation, it also has a positive suggestive effect on the human psyche, so that a person's state of mind, to change and enhance.

Of course, don't donate blood too often, try to do it once every four to six months. Don't overdo it each time either.

After donating blood, it is important to take active rest and supplement with nutrients and blood-forming related foods, and at the very least eat more nutritious foods than you normally would.

Strenuous exercise is not advisable for a few days after blood donation, but it should not be withheld in conjunction with rapid recovery of body functions.

If you have symptoms that make you suitable to donate blood, you must affirm with the staff and wait until you are physically fit to donate. If you are weak, sick or anemic, you should be careful and donate under the guidance of a professional doctor.

As long as you are in good health, donating blood once a year should not be harmful to your health and will promote the renewal of your body's functions. Donating blood is also an act of charity and deserves to be commended.

A domestic expert has 127 repeated blood donors, 87 cases of hypertension, 60 cases of ischemic stroke for blood rheology of the controlled tracking study, the results show that blood donors to reduce the occurrence of cardiovascular and cerebrovascular disease has a positive role; Finland, a research group of 278 men aged 42-60 years for the survey, found that those who have donated blood after five years of coronary heart disease than the proportion of those who have not donated blood 86% less; another group of studies, another data show that the blood donation l-2 times of 1532 people for tracking observation, the results of only one person occurred in acute myocardial infarction, the incidence rate of 0.043%. Another group of research, another data show that the blood donation l-2 times of 1532 people for follow-up observation, the results of only one person occurred in acute myocardial infarction, the incidence rate of 0.043%. During the same period of 2306 people did not donate blood, 226 people had an acute myocardial infarction, the incidence rate of 9.8%, significantly higher than the group of blood donors; the United States a cardiovascular disease research group study to verify the same conclusions, in 3 years, blood donors (men) the risk of cardiovascular disease is only 1/2 of those who do not donate blood. Men who donate blood can reduce the incidence of cancer, the body's iron content of iron is too low easy to cause iron deficiency anemia and Low levels of iron in the body can lead to iron-deficiency anemia and slowness of movement, while high levels can be counterproductive. The International Journal of Cancer has reported that iron levels above 10% of normal are associated with an increased risk of cancer, which can be prevented by donating a moderate amount of blood. The literature also mentions that women lose a certain amount of iron through blood loss during the menstrual cycle, so no significant relationship has been found between iron levels and cancer development in women.

We can often see some mobile blood collection vehicles on the streets, calling on people to donate blood. However, a lot of people are worried that blood is life, and a small amount of blood will definitely affect their health, and so will blood donation. So, is blood donation harmful to health?

Reasonable blood donation will never affect your health.A person donating 200 to 400 milliliters of blood at a time represents only 5 to 8 percent of the total blood volume, and it has been repeatedly verified by scientists thatBlood loss of less than 8% does not affect health.The body's hematopoietic function is so strong that the restoration and replenishment of blood begins almost as soon as blood is donated. First of all, part of the blood stored in the liver, spleen, lungs and subcutaneous blood participates in the blood circulation, increasing the blood volume. Water and inorganic salts in the blood are also replenished from the tissue fluids within one to two hours, and the concentration of plasma proteins returns to normal within a day or night. The red blood cell count recovers more slowly, and can be fully restored to the normal level in 2 to 3 weeks after blood donation. ThereforeA healthy person who donates blood according to the regulations will not have any effect on the body, and will not "hurt the energy", but will be more conducive to health!。

Specifically, blood donation has the following benefits:

1,Blood donation can prevent or alleviate blood viscosity and reduce the incidence of cardiovascular diseases.Regular blood donation reduces a portion of the viscous blood in the body, and then through normal drinking water, the blood is naturally diluted, and the blood consistency will then drop, which can effectively reduce the occurrence of atherosclerosis, thrombosis and cerebrovascular accidents and heart attacks.

2,Regular blood donation improves hematopoiesis.After donating blood, due to the reduction of blood cells, there is a stimulating effect on the bone marrow, which stimulates the bone marrow hematopoietic tissue and improves hematopoiesis.

3,Men donating blood may reduce the incidence of cancer.Because iron levels in the body that are more than 10 percent of the normal value increase the chances of developing cancer, donating blood lowers iron levels in the body.

4,Mental health can be promoted and improved.Donating blood is an act of helping and being kind to others, helping others and helping yourself at the same time.

5,It can prolong life.Blood donation can promote the body's metabolism, improve the body's immunity and resistance to disease, thus prolonging life.

As stipulated in the Blood Donation Act.The age of blood donation is 18-55 years old, the interval between two donations is more than 6 months, and the amount of blood donated each time is 200-400 ml. The donor and his/her immediate family members are entitled to free or priority use of blood.But it needs to be emphasized thatNot everyone is eligible to donate bloodThe doctor will conduct a strict examination before donating blood, and only those who meet the criteria will be able to donate blood.

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