Elderly patients who suddenly experience dizziness, nausea and vomiting are commonly seen for the following reasons: First, acute attacks of cervical spondylosis: Patients with a long history of cervical spondylosis, if not treated in time and usually not protected, can easily lead to an acute attack of cervical spondylosis, where the vertebral artery is stimulated while traveling in the transverse foramen, which can lead to spasmodic contraction, causing an incomplete blood supply to the brain, and can have clinical symptoms of dizziness, nausea and vomiting . In addition, stimulation of the sympathetic nerve in the neck can also lead to the above clinical symptoms. Second, acute cerebral hemorrhage or cerebral embolism: it can cause changes in intracranial pressure, and patients will have clinical symptoms of sudden dizziness, nausea and vomiting, which need to be further confirmed by CT or MRI of the head. If the above symptoms appear, it is important to pay high attention to them and go to orthopedic clinic and brain surgery clinic as soon as possible for timely treatment.