The symptoms of dizziness when old smokers smoke, the reasons should consider the following: 1, if the patient smokes too much will lead to a decrease in the concentration of oxygen in the blood, can not meet the energy supply of brain tissue, brain cells, so it will lead to the symptoms of dizziness. 2, dizziness when old smokers smoke may also be related to vasospasm, because prolonged smoking can easily lead to patients with atherosclerosis of the brain, the Cerebral vascular stenosis. When smoking too much is likely to induce cerebral vasospasm, so that the patient’s brain tissue, brain cells in a state of ischemia, lack of oxygen, manifested as dizziness. Therefore, if the patient smokes and often has dizziness, it is recommended that the patient quit smoking in a timely manner, and improve the carotid ultrasound and transcranial Doppler ultrasound examination to clarify whether the patient has cerebral artery sclerosis, cerebral vascular stenosis and other problems, and actively carry out drug treatment and intervention.