Sudden dizziness while sleeping may be caused by otoliths, which is a kind of peripheral vertigo that can occur at any age, mostly in middle-aged and elderly people, caused by otoliths detaching from the semicircular canal. The main treatment is to reset the patient’s head. If the patient’s dizziness is serious, symptomatic anti-dizziness treatment can also be given, and the commonly used drugs are vertigo stop and pethidine. In addition, the patient’s blood pressure should be checked. If the patient has high or low blood pressure, the patient can have the above symptoms. If the patient has high blood pressure, the main treatment is to lower blood pressure, commonly used drugs are amlodipine and Irbesartan. In addition, intracranial organic lesions should be excluded, such as cerebrovascular disease, commonly caused by cerebral infarction, should check the cranial CT to clarify the diagnosis.