Sudden fainting and vomiting in the elderly may be caused by cerebellar and brainstem lesions, such as cerebellar and brainstem hemorrhage and cerebellar and brainstem infarction, which should be promptly examined by cranial brain CT or cranial brain MRI to make a clear diagnosis. If the diagnosis is clear, the patient should go to neurology or neurosurgery for comprehensive treatment. If the patient has peripheral vertigo, such as Meniere’s syndrome and otolithiasis, it may also cause, Meniere’s syndrome patient’s symptoms are persistent, the patient’s dizziness can be accompanied by nausea, vomiting, rotating vision, deafness, tinnitus, the main symptom is to stop dizziness treatment. If otolithiasis is considered, usually the patient’s symptoms can appear suddenly when the head position is turned, accompanied by deafness, tinnitus, visual rotation, mainly for reset treatment. If the patient has cervical spondylosis, the sudden rotation of the head may cause a transient posterior circulation transient ischemic attack, and the above symptoms may also appear.