Vertigo is a kind of motion illusion due to the disorder of the body’s balance system, which leads to the body’s orientation to space, also clinically known as true vertigo. Its characteristics are: 1. It is a sensation with motion, typically rotational, others such as tilt, side pull, rise and sink, etc.; 2. It is often accompanied by three conditions: nystagmus; torso instability or tilting; and vagal agitation (nausea, vomiting, sweating, pallor). Dizziness, on the other hand, is characterized by a feeling of light-headedness, numbness or emptiness of the mind, light-footedness, and blurred vision without motor sensations, usually without nystagmus, tilting or overpositioning, and without obvious signs of vagal irritation. Classification of vertigo diseases: 1. aural vertigo; 2. vestibular neurogenic vertigo; 3. cerebral vertigo; 4. cervical vertigo; 5. systemic pathological vertigo; 6. ophthalmogenic vertigo.