Left frontal lobe small ischemic foci is a kind of imaging results, usually refers to the left frontal lobe ischemic cerebral infarction or the existence of old cerebral infarction, and presented on the imaging examination of a kind of manifestation. A small ischemic focus in the left frontal lobe generally refers to lacunar cerebral infarction, which usually refers to the lesion of the artery in the left frontal lobe, resulting in the occlusion of the lumen, and the formation of infarct foci of cerebral tissues due to ischemia, hypoxia, and necrosis. Ischemic foci in the left frontal lobe are relatively common and may be caused by smoking, hyperlipidemia, hypertension and diabetes. If it appears in the deep frontal lobe and does not affect the functional area, or the area that controls limb movement, sensation, speech, and swallowing, the patient may be asymptomatic, and it is only found occasionally when doing examinations, and does not require special treatment. The little ischemic foci in the left frontal lobe need to go to the hospital in time and get standardized treatment under the doctor’s guidance.