If the patient is an elderly person, the dizziness may be caused by elevated blood pressure, and it is recommended to measure the patient’s blood pressure to clarify. 2. If the patient is an elderly person with cerebral atherosclerosis or cerebral vascular stenosis, the dizziness may be caused by cerebral vascular spasm resulting in insufficient blood supply to the brain. 3.Patients who suddenly become dizzy while sitting, if accompanied by visual rotation or tinnitus, ear blindness, should be considered to be caused by Ménière’s disease, which is caused by fluid accumulation in the membrane vagus and can lead to fluctuating hearing loss after repeated attacks. 4.Patients who suddenly become dizzy while sitting, if accompanied by inflexible limb movement and ataxia, should be considered to be caused by acute cerebrovascular disease, such as cerebral infarction, cerebral hemorrhage caused.