Patients with cerebral infarction are not allowed to smoke. Long-term smoking tends to damage the intima of blood vessels, which tends to make the tangible components of blood accumulate in the walls of blood vessels, thus making the walls stiff and the lumen narrow, and making the elasticity of blood vessels poor. Long-term smoking tends to cause atherosclerosis, which causes impaired blood supply to the brain, thereby aggravating ischemic and hypoxic changes in the brain, aggravating the condition of patients with cerebral infarction and making them prone to recurrent attacks. Cerebral infarction is caused by various causes of impaired blood supply to the brain, which causes ischemic and hypoxic changes in the brain, resulting in limited necrosis and softening of brain tissue. Long-term smoking tends to increase blood viscosity, and blood viscosity also tends to cause impaired blood supply to the brain, thus aggravating ischemic and hypoxic changes in the brain. Long-term smoking also tends to increase the risk of reoccurrence of cerebral infarction in patients, and smoking is an independent risk factor. There can also be other risk factors for cerebral infarction, such as alcohol consumption and physical obesity, hyperlipidemia, hyperglycemia, hyperhomocysteinemia, and age, among others.