Although dizziness, lightheadedness and vertigo are common clinical symptoms, they have different clinical manifestations and treatment principles due to the differences in their damaged target organs and pathogenesis, and many patients are still confused. For this reason, it is necessary to give you a detailed explanation. 1. Dizziness. The main manifestation is the continuous dullness of the mind, which is caused by the reduction of the function of the higher cortical nerve activity and is not related to the activity of the head, neck and trunk. Mostly accompanied by head weight, head boredom and insomnia and other neurological disorders, exertion and stress aggravated, rest and relaxed mood to reduce. It is mostly seen in patients with neurasthenia or chronic somatic diseases. 2.Dizziness. The main manifestation is intermittent light-headedness and unstable gait, mostly aggravated during movements such as walking, standing, sitting, and lying, or when using the eyes. The following are common in clinical practice: (1) Oculogyric dizziness. It is accompanied by blurred vision and is caused by visual impairment or eye muscle paralysis. Dizziness is aggravated by eye opening and eye use, and relieved or disappears after eye closure. It is usually seen in refractive error, retinal macular degeneration and various congenital eye diseases that lead to visual impairment and extraocular muscle paralysis (often accompanied by diplopia). (2) Deep sensory dizziness. It is accompanied by a feeling of unsteadiness and cotton-like instability. The dizziness occurs during activities such as walking, standing, sitting, etc., and disappears when the movement is stopped, and is aggravated with eyes closed and in the dark, and reduced with eyes open and in the light. It is usually seen in neurological diseases such as subacute posterior lateral cord joint degeneration, posterior cord sclerosis, and peripheral neuritis. (3) Cerebellar dizziness. It is accompanied by a feeling of drunkenness-like gait instability during activities such as walking and standing. It is not affected by opening or closing the eyes, which is different from deep sensory dizziness. It is usually seen in patients with cerebellitis, vascular disease, and trauma. (4) Otolithic dizziness. It is associated with a feeling of instability during activities such as standing up, sitting down, and turning over, and is caused by dysfunction of the balance of the inner otolith. The dizziness mostly occurs in head position and/or trunk straight line activities and disappears after the movement stops. Opening and closing the eyes has no effect. It is mostly seen in inner ear pathologies such as Dandy syndrome. 3. Vertigo. The main manifestation of vertigo is a sense of rotation, floating, drifting or tumbling of self or/and external objects in a certain direction, which does not exist objectively. It can be triggered by factors such as overwork, excitement, insomnia, menstruation or excessive smoking and drinking. The attack is aggravated by eye opening, head movement and sound and light stimulation, and relieved when eyes are closed or lying still, and is often accompanied by spontaneous nystagmus, misorientation, orientation dumping, nausea and vomiting. It is most often seen in patients with Meniere’s syndrome and jugular crest stone disease.