Patients with lacunar cerebral infarction on the left side are very common in clinic, if the site of lacunar cerebral infarction is not in the main functional area, most patients do not have any symptoms, they are found to have lacunar infarction foci formation during physical examination by doing head CT, magnetic resonance. The formation of lacunar cerebral infarction is mainly related to hypertension, which is caused by long-term hypertension leading to cerebral arteriosclerosis, hardening and occlusion of small blood vessels in the brain. The foci of lacunar cerebral infarction are very small, so there are no obvious symptoms. However, patients need to pay attention to prevention against the risk factors of cerebral atherosclerosis to avoid recurrence of cerebral infarction. If multiple lacunar cerebral infarcts are formed, the formation of the lacunar state will also lead to patients with diminished intelligence, easily forming vascular dementia, with problems such as forceful crying, forceful laughing, etc., which will affect the quality of life of patients in the later stages.