I. Definition: Hallucination of spatial motion, which can be divided into subjective vertigo: the patient feels his own rotational motion; it can be manifested as: – rotational motion – horizontal motion – vertical motion. (1) Dizziness and lack of mental clarity: It is a continuous feeling of dizziness and lack of clarity. It is mostly accompanied by heavy head, stuffy head and other symptoms of neurological or chronic somatic diseases. It is aggravated by exertion. Mostly caused by neurasthenia or chronic somatic diseases, etc. (2) Dizziness – self instability: intermittent or persistent light-headedness and swaying, mostly aggravated by walking, standing and sitting. Sometimes it is manifested at different times in the same disease. Common dizziness: ocular dizziness, profound sensory, dizziness, cerebellar dizziness, otolithic dizziness, neurotic dizziness, psychological dizziness, etc. (3) Syncope: dizziness, chest tightness, black haze followed by transient unconsciousness; transient cerebral ischemia. None of them is true vertigo. (1) Central vertigo – caused by brain, vertigo + neurological signs (brainstem and cerebellar nuclei). It is commonly caused by “vertebral basilar artery insufficiency (VBI)”, multiple sclerosis, cerebellar lesions, brain tumors, stroke: cerebellar and brainstem infarction, hemorrhage of drug origin, and other rare causes. (2) Peripheral vertigo-common BPPV (benign), vaginitis, Meniere’s disease, auditory neuroma, motion sickness of cervical origin, perilymphatic fistula, etc. Vestibular neuronitis, semicircular canal infection, water in semicircular canal, etc. Nearly 1/4 of vertigo is difficult to identify the cause, so symptomatic treatment is needed to reduce the vertigo feeling, stop vomiting, control palpitations and other symptoms, and relieve the fear. Because of the complexity of vertigo, we hope to see a hospital in time.