Insufficient blood supply to the brain is not low blood pressure, they are completely different concepts. The causes of cerebral insufficiency are mainly from the following aspects, the most common in the elderly may be due to long-term hypertension, diabetes, hyperlipidemia, resulting in the sclerosis of cerebral blood vessels, vascular elasticity is reduced, the formation of plaque in the blood vessels caused by the narrowing of cerebral blood vessels, resulting in the insufficiency of cerebral blood supply, or because the blood is in a state of high fat, high coagulation, causing the slow flow of cerebral blood, patients will also be manifested as cerebral blood supply Inadequate blood supply to the brain. The presence of cardiac diseases in the elderly, such as chronic cardiac insufficiency, atrial fibrillation, and frequent premature ventricular contractions, can lead to a decrease in the heart’s pumping capacity and cause cardiogenic cerebral blood supply deficiency, resulting in dizziness and other symptoms. Low blood pressure can also cause inadequate cerebral perfusion in patients. Patients who usually have low blood pressure will not have obvious symptoms.