Dizziness is a feeling of lightheadedness when a patient has an attack. For example, the feeling in the head of a patient with hypertension at the onset of the disease, the feeling of dizziness caused by lack of sleep and excessive alcohol consumption, etc. should be called dizziness. Syncope refers to those who suddenly stand up after squatting or sitting for a long period of time and feel black eyes, eyes glazed over, unsteady standing or some kind of cause for a brief loss of consciousness, sudden and sudden collapse, etc. Both dizziness and syncope are caused by various diseases related to the central nervous system and are essentially different from inner ear vertigo. Vertigo is a sensation of the patient spinning in the sky and riding in a boat at the onset. When the symptoms are severe, the patient’s eyes are tightly closed and hands are clutching the edge of the bed for fear of falling off the bed, accompanied by nausea and vomiting, abdominal pain and diarrhea, pale face and cold sweat. Although the symptoms of vertigo are severe, the patient is conscious. Some patients may also feel the surrounding scenery swinging from side to side or floating up and down, which are symptoms unique to inner ear diseases. Strictly speaking, dizziness includes vertigo, and vertigo cannot be said to be dizziness in reverse.