Is fainting a how experience?
Many people described it as black at the moment, while others said it was stars, and then they lost consciousness until they woke up and found out: Oh, I just passed out.
So, why do people suddenly faint? Must something be wrong with your head to faint?
The answer is obviously not all.
How does fainting happen?
What we usually call [fainting], The technical term is “syncope”, which refers to a sudden and brief loss of consciousness (i.e. Unconsciousness). Our brain is the [headquarters] of the human body, and blood supply to the brain can be imagined as supplying power to the headquarters. One day, when there is a sudden power failure (when blood supply to the brain is insufficient), then the headquarters will not be able to continue to operate and will no longer be able to sense and direct the activities of the whole body.
In addition, there are various other reasons: for example, the heartbeat is irregular, which is like the power supply is not available from time to time, and the normal operation of the headquarters cannot be guaranteed. Or epileptic seizures, hypoglycemia, anemia and some neurological diseases, some of which may also be related to heredity.
The most common cause of fainting
Fainting can be a clinical manifestation of a certain disease, but it sometimes occurs in normal people.
The most common is vasovagal syncope or nerve reflex syncope, which is more common in children and adolescents. It is due to cerebral blood supply insufficiency caused by blood pressure drop, which leads to loss of consciousness.
Typically, people are in a standing position before an attack, accompanied by fever, nausea, dizziness or gloomy sight. There are many causes: anxiety, fear, pain, hunger, drinking, great mental stress or medication.
Most people with vasovagal syncope do not have potential cardiovascular diseases or neurological diseases.
Some people also faint because the body’s blood pressure is out of control, especially when people stand up quickly from lying or sitting. This phenomenon is also called orthostatic hypotension, which is also one of the main culprits of syncope. This type of syncope is more common in the elderly and infirm, or people who need to stay in bed for a long time due to illness.
Which faints need to be seen by a doctor immediately?
If you have the following conditions, it is recommended to see a doctor as soon as possible so as not to delay your illness.
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Occurring for the first time or repeatedly;
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Injury caused by fainting;
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Special groups: pregnant women or the elderly (easy to fall down and cause injuries);
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Accompanied by basic diseases: such as anemia, diabetes, heart disease, hypertension, etc.;
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Loss of consciousness lasts too long: for several minutes or more, with the possibility of epilepsy.
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Before losing consciousness, there are symptoms such as chest tightness, arrhythmia or severe heartbeat.
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There are other accompanying symptoms such as incontinence of urine and feces.
Other causes of fainting:
Autonomic nervous system disease
Autonomic nervous system is an important part of nervous system, It is mainly used to control the autonomous activities of the human body that are not controlled by consciousness. Such as heartbeat, vasoconstriction and respiration. In addition to syncope, these diseases may be accompanied by other symptoms, such as erectile dysfunction (inability to erect or maintain erection), incontinence, disappearance of pupil reflex, and decreased secretion of sweat glands, lacrimal glands and salivary glands.
Diseases affecting the nervous system
These diseases include diabetes, alcoholism, malnutrition, etc. In addition, some drugs to treat hypertension will affect vasoactivity and blood flow in the body, thus changing blood pressure and possibly inducing syncope.
Cardiovascular problems
It will affect the blood supply of the brain, including heart conduction block, arrhythmia (irregular beating of the heart), aortic stenosis and other problems of heart structure.
Causing abnormal excitation of peripheral nerves
Including urination fainting (fainting after urination), glossopharyngeal neuralgia (fainting caused by inflammation and pain of oral peripheral nerves), cough fainting (fainting after severe cough) and exercise fainting (mainly occurring when stretching neck and arms).
Hyperventilation
When people become highly anxious or panicked, breathing accelerates and deepens, and fainting may occur due to excessive ventilation (inhaling oxygen and exhaling carbon dioxide too fast).
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