Insufficient blood supply to the brain does not cause low blood pressure in patients, but if the blood pressure is too low, it can easily lead to insufficient blood supply to the brain in patients. The cause of cerebral insufficiency is mainly due to atherosclerosis of the brain arteries, narrowing of blood vessels or blood in a high-fat, high-viscosity state, causing slow blood flow to the brain and forming cerebral insufficiency. Insufficient blood supply to the brain is usually manifested as dizziness and headache. When acute attack occurs, it may cause patients to have symptoms of neurological deficits such as transient inflexible limb movement, numbness of limbs, slanting of the mouth, clumsy speech, visual field loss, dizziness, choking on water, and fall attacks, which need to be treated by a hospital in time to avoid progression to cerebral infarction.