Dizziness and cerebral distension may be caused by excessive mental stress, cerebrovascular disease, hypertension and infection. 1. Excessive mental stress: when patients have excessive mental stress for a long time, the symptoms of dizziness and cerebral distension may occur. 2. Cerebrovascular disease: when there is cerebral ischemia or cerebral hemorrhage, the symptoms of dizziness and cerebral swelling and pain may occur, which may also be accompanied by impaired consciousness and hemiparesis. 3. Hypertension: Hypertension is caused by high blood pressure in the arteries, and when the patient’s blood pressure is elevated, the patient may suffer from dizziness and cerebral distension. 4. Infection: Infections caused by various reasons, such as upper respiratory tract infection, pneumonia, meningitis, etc., may cause dizziness and cerebral distension, usually accompanied by fever. When patients have dizziness and swelling pain, they should go to the hospital in time, after clarifying the cause of the disease and actively cooperate with the doctor for treatment.