Patients with dizziness for half a day mainly consider the following aspects: first, if the dizziness is persistent, it should be considered to be caused by cerebral insufficiency of blood supply, patients have a history of cerebral atherosclerosis; second, attention should be paid to monitoring the patient’s blood pressure, patients with previous hypertensive disease, dizziness accompanied by headache symptoms, should be considered to be elevated blood pressure, can be measured by blood pressure clear; third, if the patient is dizzy Thirdly, if the patient has dizziness with ataxia and unstable walking, it should be considered as acute cerebrovascular disease, and the lesion may be in the cerebellum, such as cerebellar infarction or cerebellar hemorrhage; fourthly, if the patient has dizziness with tinnitus and stuffy ears, it should be considered as an attack of Meniere’s disease; fifthly, if the patient’s dizziness is aggravated by the change of head position, it should be considered as benign, paroxysmal or positional vertigo.