What causes dizziness due to insufficient blood supply to the brain?

　　Dizziness caused by insufficient cerebral blood supply may result from conditions such as hyperlipidemia, hypertension, cervical spondylosis, or atherosclerosis.

　　1. Hyperlipidemia

　　If a patient fails to maintain a balanced diet and consistently consumes excessively fatty, high-fat foods, hyperlipidemia may develop. Excess lipids can gradually accumulate in the body, affecting small arteries—causing narrowing—and thereby reducing cerebral blood flow, leading to dizziness.

　　2. Hypertension

　　Uncontrolled hypertension—without timely dietary intervention or targeted pharmacological treatment—may lead to further elevation of blood pressure. Persistently elevated blood pressure can induce spasm of cerebral arteries, impairing cerebral perfusion and resulting in dizziness.

　　3. Cervical Spondylosis

　　In patients with cervical spondylosis—for example, misalignment of the sixth cervical vertebra—the vertebral artery may become irritated, leading to arterial spasm or stenosis, reduced blood flow, and consequently, dizziness due to insufficient cerebral perfusion.

　　4. Atherosclerosis

　　In atherosclerosis, detached atherosclerotic plaques may embolize into small cerebral arteries, causing vascular occlusion and resulting in dizziness secondary to cerebral hypoperfusion.