There are many reasons for dizziness and nausea. Generally speaking, dizziness can be divided into peripheral dizziness and central dizziness. Peripheral vertigo is mainly caused by vestibular system diseases, such as vestibular neuritis, Meniere's disease, benign positional vertigo and inner ear diseases. And central vertigo is generally caused by brain diseases. Any disease affecting brain stem and cerebellum will lead to dizziness, and cerebral infarction is more common in clinic.