Sudden dizziness and inability to stand up in the elderly may be caused by cerebellar brainstem infarction or hemorrhage. Patients with cerebellar brainstem infarction usually start in a quiet state. Patients may suddenly develop dizziness, nausea, vomiting, as well as balance disorders and ataxia, or they may have difficulty swallowing and choking on water, and some patients may even have explosive speech, or they may have nystagmus and diplopia. Most patients have a history of atherosclerosis, patients often have hyperlipidemia and hyperglycemia, and cranial CT exams are usually hypodense lesions. If cerebral stem hemorrhage is considered, most patients have an active onset. Patients can suddenly develop these symptoms, and the main causes include hypertension and aneurysm. Patients should be admitted to the hospital for comprehensive treatment if they have any of these diseases. It may also be seen in peripheral vertigo. The common diseases that cause peripheral vertigo in elderly people include Meniere’s syndrome and otoliths.