First of all, as cigarettes contain nicotine and other toxic substances, after entering the human body, they may cause cerebral vascular spasm, affecting the blood supply to the brain, leading to insufficient blood supply to the brain and symptoms such as dizziness. In serious cases, it may even lead to cerebral infarction. Secondly, long-term smoking also leads to an increase in carbon monoxide in the blood, which affects the oxygen-carrying function of brain cells, leading to cerebral ischemia and hypoxia, which can easily cause cerebral vasospasm, and even lead to cerebrovascular accidents in serious cases. In addition, due to the paralyzing effect of certain components of cigarettes, heavy smoking may lead to cerebral nerve overexcitation, memory loss and lack of concentration. Cigarette smoking is a confirmed carcinogenic factor. Therefore, smokers are advised to quit smoking. If any obvious physical discomfort occurs during smoking, they should go to the hospital in time to identify the cause of the disease and follow the doctor’s instructions for treatment.