Dizziness is a manifestation of cerebral nerve disorders. The specific causes may be poor blood circulation, hypoxia, hypoglycemia leading to a lack of energy in the brain nerves or mental fatigue and neurological disorders. Causes: The causes are often anemia, poor sleep, stress, cerebral infarction, lack of blood supply to the brain, cervical spondylosis, physical weakness, cardiovascular disease, hyperlipidemia, high myopia, etc. It can involve multiple disciplines and is often accompanied by other symptoms. For example, the feeling of onset of hypertension, dizziness from lack of sleep and excessive alcohol consumption; sudden standing up from a long squatting or sitting position and feeling black eyes, blinding, unstable standing or sudden fall due to some reasons, etc. are not vertigo but syncope. Both dizziness and syncope are caused by various diseases related to the central nervous system. The difference between dizziness and vertigo: When the patient feels that he or she is spinning around, he or she may feel that the surrounding scenery is swinging from side to side or floating up and down, which is called vertigo. If you feel that you are spinning in space (called subjective vertigo), or that things around you are spinning around you (called objective vertigo), it is often accompanied by loss of balance. The most common type of vertigo is motion sickness, i.e. motion sickness, seasickness and airsickness, which is caused by the inner ear vagus not adapting to strong mechanical shocks. The patient’s eyes are tightly closed, hands are holding the bed, fearing to fall off the bed, accompanied by nausea and vomiting, and in severe cases, vomiting bitter water, abdominal pain and diarrhea, pale face and cold sweat. Although the symptoms are severe, the patient is conscious, which is a characteristic symptom of inner ear disease.