When the elderly feel dizzy, they should first stay in bed to avoid emotional tension and sound and light stimulation. Send the elderly to the hospital immediately, because the dizziness of the elderly is still insufficient blood supply to the brain, which is posterior circulation ischemia. When diagnosing posterior circulation ischemia, the elderly must have magnetic resonance imaging of the head. After the completion of head magnetic resonance imaging, cerebral hemorrhage and brain space occupation can be ruled out, so as to make the diagnosis and symptomatic treatment of posterior circulation ischemia. Drugs that stabilize plaque, reduce platelet aggregation, promote blood circulation and dredge collaterals, and improve circulation can improve dizziness in the elderly.