Dizziness and vertigo are both common clinical symptoms, and they have similarities and essential differences. 1. Vertigo is mostly a sensation of rotation of the surroundings and oneself. It is mostly caused by central or peripheral vestibular dysfunction, and is also an illusion of spatial disorder. Vertigo can be divided into true vertigo (dizziness) and pseudovertigo (lightheadedness or dizziness). True vertigo is mostly caused by diseases of the eye and vestibular system, and can sometimes appear as a distinct sensation of rotation of external objects or of oneself. Pseudovertigo is mostly caused by systemic diseases, such as cardiac and cerebrovascular diseases, anemia, uremia, drug intoxication, endocrine diseases and neurosis. 2. Dizziness (pseudovertigo) is a generic term for dizziness of the mind, swelling of the mind, lightness of the head, shaking of the brain, and blurred vision. It is commonly associated with anemia, postural hypotension, and systemic disorders. If dizziness is accompanied by balance and visual disturbances, you may feel your body rotating and swaying, etc. Occasionally it is not a big problem, but if it is frequent, it may be a serious disease and requires timely examination and diagnosis. When head discomfort occurs, it is recommended to go to a regular hospital for treatment as soon as possible.