Patients may have dizziness at intervals due to the following reasons: 1) Patients may have cerebral atherosclerosis and insufficient cerebral blood supply, which may trigger the aggravation of cerebral blood supply and episodic dizziness when they are tired and have bad rest. 2) Patients may have hypertension, and the unstable control of blood pressure or irregular taking of antihypertensive medication may also lead to episodic dizziness. 3) Patients with tinnitus and stuffy ears may have Meniere’s disease, which may be caused by repeated episodes of Meniere’s disease. The fluctuation of blood pressure is relatively large, which can also lead to episodic dizziness. 3, patients with tinnitus, ear boring symptoms, may be caused by Meniere’s disease, Meniere’s disease after repeated episodes of the patient may have fluctuating hearing loss, you can do the electroacoustic hearing clear. 4, the patient appeared at intervals of time dizziness, may be related to the patient’s sleep is not good.