There are many causes of dizziness, blurred vision, nausea and other clinical manifestations, the common causes are mainly the following: 1, postural hypotension, mostly seen in the squat after getting up dizziness, blurred vision, nausea and other clinical manifestations, because after a long squat most of the body blood gathered in the lower part of the body, get up instantly blood is too late to redistribute, which leads to transient ischemia and hypoxia of the brain, resulting in the above symptoms. The symptoms are episodic dizziness, dizziness, nausea and vomiting, lasting from a few seconds to tens of seconds, not more than a minute, accompanied by nystagmus, which can be clearly diagnosed through postural change experiments, and can be improved by manipulative reset treatment. 3. transient ischemic attack, caused by transient cerebral artery blood supply deficiency, sudden, short-lived, reversible neurological problems. Transient cerebral ischemic attack is a sudden, transient and reversible neurological deficit, mainly manifested as transient dizziness, dizziness, nausea, visual field loss and other clinical manifestations, and can be treated symptomatically by taking Cipro, triclopidine and other drugs to improve cerebral circulation.