Insufficient blood supply to the brain may cause dizziness, lightheadedness, lightheadedness, weakness of the limbs, memory loss, tinnitus and other symptoms, which require timely medical treatment. Cerebral blood supply insufficiency is commonly found in patients with hyperlipidemia, hypertension, diabetes, cerebral arteriosclerosis and long-term smoking. Due to blood viscosity, thickening of blood vessel wall, narrowing of blood vessel lumen and other reasons, blood flow slows down, resulting in limitation of blood supply to the brain, which results in symptoms of brain dysfunction, such as dizziness, lightheadedness, dizziness, weakness of the limbs, loss of memory, and tinnitus. In case of insufficient blood supply to the brain, it is recommended to go to the hospital immediately for consultation and treatment under the guidance of a doctor, quit smoking in daily life, control the related risk factors and undergo regular checkups.