Dizziness may be due to the following reasons: 1. Meniere’s disease, which is most common in young and middle-aged women, is characterized by sudden onset of severe dizziness, accompanied by nausea, vomiting, tinnitus and hearing loss. 2. Benign paroxysmal positional vertigo, which is most common in middle-aged and elderly people, is associated with changes in body position, and is severe during episodes of dizziness, often accompanied by nausea, vomiting, panic, sweating and other symptoms. 3. posterior circulation infarction, including brainstem and cerebellar infarction, mostly seen in elderly people with hypertension, diabetes mellitus, and hyperlipidemia, with sudden onset of dizziness and heavy and persistent symptoms, which may be accompanied by obvious nystagmus and ataxia. 4. vertebral artery cervical spondylosis, about 10%-30% of patients with dizziness are caused by cervical spondylosis, in addition to vestibular neuritis and auditory neuroma, which can also cause obvious symptoms of dizziness.