If the left frontal lobe injury is mild, the general recovery period after surgery is 3~6 months; if the frontal lobe injury is more serious, with post-infarction hemorrhage in the frontal lobe area, the recovery period will be prolonged, or even left with permanent disability. In the case of minor frontal lobe injury, patients usually have only minor mental disorder, apathy, slow reaction, etc. After surgery, there will be more obvious recovery in about 3~6 months, and the speed of recovery will gradually decrease after 6 months. If the left frontal lobe injury is more serious, obvious mental disorder, limb hemiparesis, speech dysfunction, motor disorder, etc., the difficulty of recovery will be significantly increased, and the recovery period will be longer, even up to a few years, and in serious cases, it is easy to cause permanent damage. After surgery for left frontal lobe injury, you should follow your doctor’s instructions for follow-up treatment and rehabilitation to maximize your recovery.