A bout of dizziness appears to be caused by the following reasons: 1st, the performance of vertigo, vertigo is a relatively common clinical disease, the onset of no signs and symptoms are more serious. The pathogenesis is often due to insufficient blood supply to the brain or ear nerve disease. No. 2, a bout of dizziness and shaking in front of the eyes may also be caused by the cold, high fever, when people have a high fever often appear dizziness, shaking in front of the eyes, coma and other uncomfortable symptoms, through medical history, blood tests can be clearly diagnosed. For example, when the blood pressure of a hypertensive patient suddenly rises, the patient often appears dizzy and shaky in front of the eyes, so the diagnosis can be made clearly by taking blood pressure and asking for a medical history.