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Anonymous users2024-02-12When a person is in a squatting position, the lower limbs are flexed, and the blood vessels of the lower limbs are compressed so that the blood is not easy to flow to the lower limbs, and the lower limbs appear to be ischemia.
When a person who has been squatting for a long time suddenly stands up, the blood vessels of the lower limbs are restored to unblocked, and at this time, it is like suddenly opening the floodgates, and the blood will rush to the lower limbs in large quantities, so that the head will not have enough blood, and the brain will not get enough oxygen and nutrition for a while.
The conclusion is that this phenomenon is mostly a normal phenomenon and is not caused by anemia.
2. When standing up after squatting for a long time, it is advisable to stand up slowly to reduce the discomfort caused by this; Care should even be taken to clean up the work site to prevent injuries after a brief loss of consciousness and a fall to the ground.
3. It is advisable to participate in more physical exercise to enhance cardiovascular function.
Why do people get dizzy when they stand up after squatting for a long time?
If you squat on the ground for a little longer, and when you stand up suddenly, you often feel the world spinning and your eyes are full of stars. This is caused by temporary anemia of the head. When a person is squatting, there are some special cases for the distribution of blood in the body.
The first is that the two legs are pressed very tightly, the blood vessels are flattened, and the blood reaching the lower limbs is relatively small; Secondly, because the head is slightly tilted forward when squatting, the blood to the head is relatively more distributed.
When you stand up suddenly, the blood vessels in the lower limbs suddenly release the compression, so a significant part of the blood flows to the lower half of the body.
In addition, blood also has a certain weight in the body, and when you stand up suddenly, the blood flow will also flow to the lower half of the body due to the attraction of gravity and inertia, and the blood distributed to the upper body will be reduced. In addition, when standing up, the head is also upright, and it is more difficult to spurt blood from the heart to the high head.
All of this results in a relative decrease in blood flow to the head. The human brain is the most in need of blood oxygen, and a temporary reduction in blood supply can make people feel dizzy due to temporary cerebral anemia. In addition, due to the decrease in blood in the head, the blood supply to the eyeballs is naturally less, so the phenomenon of dazzling and Venus will occur.
At the same time, anemia and hypoglycemia can aggravate this phenomenon.
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Anonymous users2024-02-11This symptom is called orthostatic hypotension.
Many people have this experience, after squatting for a long time and then standing up suddenly, they will feel dizzy and black. The main reason for this phenomenon is temporary anemia in the brain.
When people squat, the waist and legs are bent, the blood can not go up and down, if you stand up at this time, the blood will flow down quickly, resulting in local ischemia of the upper body, but the brain and eyes have particularly strict requirements for oxygen and nutrients, and they must not be slackened at all. If the body is already weak, the situation will be more serious.
However, don't panic when this happens, you don't have to go to the hospital, the blood supply to the head is insufficient, the heart will immediately work hard, busy pumping blood, and it won't take long for the human body to return to normal. Of course, be careful not to move too violently when standing up, as slowly as possible, so that the blood does not flow too violently, and the blood supply to the heart can keep up, and this phenomenon will not occur.
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Anonymous users2024-02-10That's a symptom of anemia. The same can happen with overwork ... Squatting for too long causes insufficient blood supply to the brain. So it will be black in front of your eyes. Sometimes it's like this online for a long time. 、
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Anonymous users2024-02-09Lack of oxygen to the brain, nothing serious. If you are always black, you are anemic. Inadequate blood supply to the brain.
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Anonymous users2024-02-08Instantaneous lack of oxygen to the brain. No big deal.
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Anonymous users2024-02-07Standing too violently, the blood supply is insufficient.
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Anonymous users2024-02-06Mainly due to squatting for a long time, insufficient blood supply to the brain, suddenly standing up, the blood flow of the whole body is very fast, the brain will feel very stuffy and full all of a sudden, and then the blood will be blocked by various blood vessels, compressing the optic nerve, you will feel that the eyes are invisible, and in serious cases, you will faint, this is a manifestation of anemia, usually drink more brown sugar water and eat some red dates, and it will be fine in a few days!
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Anonymous users2024-02-05There are two possibilities! One: It's a normal phenomenon, don't worry too much. 2: Maybe your blood pressure is a little low, it is recommended to measure your blood pressure. Eat more vegetables.
If we squat for a long time, the blood supply to the brain will be insufficient, so we will feel dizzy when we stand up, and if we have low blood pressure or malnutrition, this situation will be more violent.
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