Sudden dizziness and blacking out

The human brain is a very complex structure, which is divided into the left brain, the right brain, and the cerebellum. Each part of the brain structure is responsible for a different part of the body. Therefore, when there is a problem with the human brain, it will directly affect the normal functions of other parts of the body, which is a very scary thing. So if some people suddenly feel dizzy and their vision goes black, does that mean there is something wrong with their brain? Or is it caused by other reasons?

1. What causes sudden dizziness often?

Dizziness can be caused by many reasons and is a common functional brain disorder, characterized by feelings of dizziness, head swelling, heaviness, shaking in the brain, and blurred vision. The most common causes are febrile diseases, hypertension, cerebral arteriosclerosis, craniocerebral trauma syndrome, neurosis, etc. In addition, it is also seen in anemia, arrhythmia, heart failure, hypotension, drug poisoning, uremia, asthma, etc.

1. Dizziness is not vertigo

Dizziness is a very vague feeling, generally including lightheadedness, heaviness in the head, darkness in front of the eyes, weakness, etc. Vertigo is a feeling of spinning, moving, or shaking, leading to a loss of balance. This is why when you go to the hospital for consultation, the doctor will ask you why you feel dizzy, because the two symptoms correspond to different diseases.

2. When you have a cold or fever

Why might a cold cause dizziness? Because when you have a cold and fever, the body will show self-protection behavior. The increased body temperature brings a series of side effects, resulting in symptoms such as dizziness and headache, telling you that "I" am sick.

3. Your health is declining

Sometimes due to lack of sleep, you may feel physically weak and have no energy to do anything. Being weak or malnourished may also cause dizziness.

4. Sub-health

Both anemia and hypoglycemia will cause blurred vision or dizziness, but anemia usually causes dizziness, fatigue, pale face, and physical weakness due to insufficient oxygen supply, while hypoglycemia usually causes hunger, palpitations, and sweating. So you can judge whether you have anemia or hypoglycemia based on these characteristics.

5. When you have cervical pain

Due to long-term poor posture or sleeping position, people often experience tight neck, limited flexibility, occasional pain, numbness, coldness, and heaviness in the fingers. Cervical spondylosis compresses the cervical vertebral arteries, causing insufficient blood supply to the brain, which is the main cause of dizziness caused by this disease.

2. What diseases should we be alert to when we have dizziness?

1. Anemia

If the elderly experience dizziness, fatigue, or pale complexion, they should go to the hospital for a check-up to see if they have anemia. If the elderly do not pay attention to nutritional health, they are likely to suffer from anemia. In addition, elderly patients with indigestion, peptic ulcer, gastrointestinal bleeding and chronic inflammatory diseases may all develop secondary anemia.

2. Cervical spondylosis

Tightness in the neck, limited flexibility, occasional pain, numbness, coldness, and heaviness in the fingers are common. Cervical spondylosis compresses the cervical vertebral arteries, causing insufficient blood supply to the brain, which is the main cause of dizziness caused by this disease.

3. High blood viscosity

Hyperlipidemia and thrombocythemia can increase blood viscosity and slow blood flow, resulting in insufficient blood supply to the brain and symptoms such as fatigue, dizziness, and weakness. There are many reasons for high blood lipids, the most important of which is unreasonable diet structure.

4. Hypertension

In addition to dizziness, patients with hypertension often also experience discomfort such as headache, palpitations, irritability, tinnitus, and insomnia.

5. Cerebral arteriosclerosis

The patient feels dizzy and often suffers from insomnia, tinnitus, emotional instability, forgetfulness, and numbness in the limbs. Cerebral arteriosclerosis reduces the inner diameter of blood vessels, reduces blood flow in the brain, causes insufficient blood and oxygen supply to the brain, and causes dizziness.

6. Heart disease

In the early stages of coronary heart disease, some people may experience headaches, dizziness, weakness in the limbs, and difficulty concentrating. Dizziness is mainly caused by atherosclerosis of the coronary arteries of the heart, resulting in insufficient blood supply.