The left frontal lobe ischemic foci are not severe, a descriptive term in the report of CT or MRI of the head of the brain. The specific cause is occlusion of the deep penetrating branches of small arteries in the brain, or ischemia causing focal cerebral ischemic lesions, which are very small in extent and usually do not cause clinical symptoms. However, it is important to draw the attention of patients to pay attention to the usual control of blood pressure to avoid the aggravation of cerebral atherosclerosis, which can be taken orally by aspirin to prevent the occurrence of cerebral infarction. To control the risk factors that cause cerebral atherosclerosis, control blood pressure, blood lipids, blood sugar, control hyperhomocysteinemia, quit smoking and limit alcohol, low salt and low fat diet.