After squatting for a long time, my eyes turn black when I stand up

Everyone must have experienced that after squatting for a long time, their vision will go dark when they stand up. Most women think that this is caused by anemia. In fact, dark vision when standing up after squatting for a long time is not necessarily caused by anemia. Squatting for a long time may cause a temporary lack of blood supply to the brain, which will cause black vision when standing up quickly. The following are some reasons why your eyes may turn dark when you stand up after squatting for a long time.

Feeling dizzy and having blackouts when you suddenly stand up after squatting for a long time is not necessarily caused by anemia, although anemia can also cause this symptom. If this symptom occurs frequently and does not improve after conditioning, you should go to a regular tertiary hospital for corresponding examination in time. Among them, the symptoms that cause dizziness include: colds, cardiovascular diseases, brain tumors, cervical spondylosis, neurasthenia, cerebral hemorrhage, improperly controlled diabetes, arrhythmias, etc.

1. When you feel dizzy, black eyes, numb legs and feet when you suddenly stand up after squatting for a long time, it is clinically called orthostatic hypotension or postural hypotension. Because the human body has been squatting or sitting for a long time, when it suddenly stands up, the blood in the whole body quickly flows to the waist and legs, resulting in a temporary lack of blood supply to the brain. In addition, the functioning of the brain and eyes requires normal blood supply at all times. Therefore, even a brief lack of blood supply can cause dizziness and blackness. What we need to pay attention to is that for some people with weaker bodies, after squatting for a long time, they should not stand up too violently, and their movements should be slow during the process.

2. Since blood has a certain weight in the body, when you stand up suddenly, the blood will flow to the lower part of the body due to the attraction of gravity and inertia, and the amount of blood distributed to the upper body will be reduced. In addition, when you stand up, your head also stands upright, making it more difficult for the heart to spray blood to the head. This results in a relative decrease in blood flow to the head, because the human brain needs blood for oxygen supply. A brief reduction in blood supply may make people feel dizzy due to temporary cerebral anemia.

3. This phenomenon will be aggravated when related symptoms such as anemia and hypoglycemia occur. If you encounter this situation, don't panic too much. Just take a short rest and stretch your muscles and bones, and the blood supply to the heart will gradually return to normal, and the symptoms of dizziness and blurred vision will disappear.