If an elderly person in his 60s suddenly becomes dizzy, the following causes should be considered: First, if the patient is simply dizzy with head swelling, consider whether it is caused by elevated blood pressure, which can be measured to clarify. Second, if the degree of dizziness is heavy, accompanied by unstable walking, ataxia, or visual field defects or double shadows when looking at things, and inflexible limbs, we should consider acute cerebrovascular diseases, such as transient ischemic attack, cerebral infarction, cerebral hemorrhage and other diseases. In this case, it is necessary to consult a hospital early for examination and treatment. Thirdly, if dizziness occurs during the change of head position, accompanied by rotation of visual objects, it should be considered to be caused by otoliths. Patients can be diagnosed by doing a position test, and then be treated with manual repositioning.