There are many clinical causes of dizziness, mainly in the following aspects: 1. Vertigo related to position change, that is, when turning over, lying down or getting up, it induces dizziness of spinning and spinning, and after lying down or being still, the dizziness is relieved quickly, usually for a short period of time, ranging from tens of seconds to two minutes, without tinnitus or hearing changes. In this case, benign paroxysmal positional vertigo is considered, a shift test can be performed, and if characteristic nystagmus is induced, the diagnosis is clear, and treatment is mainly reset treatment. 2. If vertigo is accompanied by tinnitus, deafness, or even fluctuating hearing loss, and the vertigo lasts from twenty minutes to twelve hours, Meniere’s disease is considered. 3. If vertigo is continuous and lasts more than seventy-two hours, the patient If there is a cold trigger and there is spontaneous nystagmus on physical examination, consider vestibular neuronitis, and the treatment is mainly with hormone therapy.4. If it is an elderly person with risk factors of cerebrovascular disease such as hypertension and diabetes, and there is a sudden spinning dizziness and nystagmus on physical examination, consider posterior circulation cerebral infarction, and it is better to do cranial MRI for exclusion.