Sudden dizziness is a subjective sensory abnormality, patients often show symptoms of head heavy, there are many reasons, usually related to blood sugar, blood pressure abnormalities or abnormal heartbeat rhythm and other factors, as follows: 1, the causes and treatment: 1, physiological factors: such as insufficient rest, the existence of sleep disorders or emotional tension, can appear sudden dizziness phenomenon, transient appear, usually after rest can be relieved; 2, brain supply Insufficient blood supply: due to cerebral vascular blockage or cerebral hemorrhage and other phenomena, easily caused by cerebral ischemia resulting in brain dysfunction, eventually leading to headache, dizziness, impaired consciousness and other symptoms, the symptoms of mild can choose to take oral aspirin and other medication under the guidance of a doctor, the symptoms of serious recommended surgery; 3, hypertension: due to increased blood pressure caused by intracranial pressure also rose, thus compressing the cerebral blood vessels and nerves, the phenomenon of sudden 4. Hypoglycemia: When the blood sugar is too low, it will lead to the phenomenon of insufficient blood supply to the brain and cause sudden dizziness, which can be relieved by eating sugar or food with high sugar content, and if necessary, glucose solution can be injected. Vertigo, which is more common in middle-aged and elderly patients. To relieve this kind of dizziness you need to go to the ENT department of a hospital to seek medical advice and actively treat the original disease. In addition, other clinical diseases can also cause sudden dizziness episodes, such as anemia and vestibular dysfunction, etc. It is recommended to seek medical examination after resting and relieving dizziness symptoms to clarify the cause for symptomatic treatment. Caution: When sudden dizziness occurs, rest in place and move again when the symptoms improve and the dizziness subsides. There is no need to be overly nervous when sudden dizziness occurs, if there is a companion accompanying you, let them help you to a safe place. Patients with basic diseases such as hypoglycemia should carry sugar cubes with them to facilitate emergency treatment.