Dizziness is not necessarily due to high blood pressure, but may also be caused by diabetes mellitus with insufficient cerebral blood supply, intracranial space-occupying lesions, or cerebral vasospasm. 1. Diabetes mellitus with insufficient cerebral blood supply: the typical symptoms of diabetes mellitus are excessive drinking, excessive eating, excessive urination and weight loss. When accompanied by insufficient blood supply to the brain, the manifestation of excessive urination and dizziness may appear. 2. Intracranial space-occupying lesions: for example, tumors near the hypothalamic neuropituitary node in the skull can lead to central dysuria. It will make the urine volume increase absolutely, and the patient may have dizziness, fever, irritability and other manifestations. 3. Cerebral vasospasm: the attack of cerebral vasospasm will lead to the reduction of cerebral blood flow, so the patient may have dizziness, speech disorders and other manifestations. If you drink too much water in a short time before the attack, it can also lead to excessive urination. Urine dizziness is not necessarily high blood pressure, the patient should go to the hospital in time to check, clear causes should be under the guidance of the doctor for treatment.