Vertigo is a general term for dizziness and lightheadedness. Dizziness means that the eyes are blurred or blackened, and the vision is blurred; dizziness means that you feel that you or the outside world is rotating, and that you are unsteady on your feet. The two are often seen together, so they are collectively referred to as vertigo. A sudden onset of vertigo is unbearable and then passes in an instant. There are many causes of vertigo, which can be “minor” or even physiological, or it can be a manifestation of a serious disease. Neurogenic vertigo is mostly caused by lesions of the brain, cerebellum and brainstem. Cerebral arteriosclerosis is the most common cause of vertigo in the elderly. Cerebellar artery thrombosis often causes patients to experience sudden and severe vertigo with vomiting and unsteadiness on standing. Cervicogenic vertigo, when cervical spondylosis causes compression of the vertebral basilar artery, can cause the patient to experience sudden vertigo due to insufficient blood supply to the brain. Therefore, vertigo should not be taken lightly. It is necessary to give a detailed medical history and the specific history of the attack to the doctor, and also to undergo a series of tests to clarify the cause of vertigo.