There is a kind of vertigo that only has dizziness and light-headedness, and may also have swaying instability or even fall, but does not deviate to one side, has no clear sense of motion of the surroundings or its own rotation, and does not show nystagmus, which is called pseudovertigo, or nonsystemic vertigo. Vertigo is often accompanied by balance disorders, unsteadiness, nystagmus, deflection and tilting of objects, and autonomic dysfunction such as nausea, vomiting, pallor, sweating, change of pulse and blood pressure, etc. This kind of vertigo is called true vertigo and is caused by vestibular nervous system pathology. Another way to distinguish between these two types of vertigo is to ask how long the symptoms have lasted. Generally speaking, if the symptoms last for more than a few months, they are more likely to be non-vestibular systemic vertigo; if they last for a very short time, they are more likely to be vestibular lesions. Older people may have problems with high blood pressure and high blood viscosity, so they are prone to central vertigo. Vertigo caused by transient cerebral ischemia has a short duration and can be recovered quickly; while vertigo caused by cerebral infarction, tumor, inflammation, etc., will have a longer duration. It refers to dizziness without a sense of rotation. It is a sense of swaying instability of external objects or oneself, or swaying from side to side or back and forth, aggravated when gazing at moving objects, or in noisy environment. The symptoms are mild, accompanied by non-significant vegetative symptoms, and last for a long period of time, up to several months, mostly due to brain and eye disorders. Such as ocular vertigo, cardiovascular disease, systemic poisoning or infection or metabolic disease, anemia, cervical spondylosis and cervical myopathy, neurosis and head trauma.