After craniotomy, there may be times when there is no effect at all. Because in clinical practice, although craniotomy will affect some of the nerve cells, there is a rich compensatory mechanism in the brain, and other normal nerve cells can compensate for the function of the nerve cells that have been ischemic and necrotic. This is a relatively good mechanism in the human body. If this mechanism is relatively perfect, it has no effect on the human body, i.e. no effect at all after craniotomy. If the compensation is poor, it may cause more serious complications or sequelae, such as numbness and weakness of the limbs, speech dysfunction, etc., to be closely related to the injury of the patient. With the continuous advancement of technology, many craniotomies are minimally invasive and really do not have much impact on the patient.