Left anterior cerebral artery section A2 occlusion may have compensatory blood supply, the specific situation varies from person to person, it is recommended to consult a doctor in time. Human cerebral blood vessels have a relatively rich compensatory mechanism, if it is chronic occlusion, can form collateral circulation compensation, does not affect the corresponding blood supply to the brain tissue, there will be no clinical symptoms, generally through the cerebrovascular imaging examination found occlusion. In case of acute occlusion, it can lead to cerebral infarction, and clinical manifestations such as nausea, vomiting, dizziness, headache and limb weakness may occur. Some patients may also experience compensatory blood supply after aggressive and effective treatment and promotion of collateral circulation and other treatments. It is recommended to seek prompt medical attention and intervention and treatment under the guidance of a doctor when left anterior cerebral artery A2 segment blockage is detected.