Left basal ganglia foci are mostly caused by infarction of small arteries in the brain, and usually do not cause serious symptoms. The left basal ganglia foci usually do not cause neurological deficits, but a small number of people may have simple motor or sensory symptoms, and the symptoms are mild, and related to high blood pressure, high blood glucose, high blood lipids and other triggers. Left basal ganglia cavernous foci can be treated by thrombolytic therapy, antiplatelet therapy, and neuroprotective therapy; commonly used drugs include alteplase, aspirin, clopidogrel, cytarabine, and so on. In addition to the above treatments, it is also necessary to actively control blood pressure, blood glucose, and blood lipids to prevent the disease from continuing to develop, so as to avoid serious consequences; the diet should be low-salt and low-fat diet.