Sudden dizziness, blurred vision, unsteadiness and vomiting may be related to many factors, mainly consider the following aspects: first, if the patient is accompanied by panic, hunger is more serious, to consider that it is caused by hypoglycemia, this category may be because the patient eats less, exercise more or have diabetes patients are prone to appear; second, if the patient has hypertensive disease inappropriate When the blood pressure is lowered too low, it is easy to have hypotensive reactions, which may manifest as sudden dizziness, dizziness, unsteadiness, and vomiting; thirdly, if an elderly person has sudden acute cerebrovascular disease, such as cerebellar infarction or cerebellar ischemia, it is easy to have sudden dizziness, dizziness, unsteadiness, severe nausea, and vomiting, which may be accompanied by ataxia, postural balance of the limbs Fourthly, some peripheral vertigo, such as Meniere’s disease and otoliths, may cause patients with heavy symptoms, dizziness and unsteadiness.