The easiest way to determine if there is a problem after a head injury is to review the head CT, because all neurosurgical diseases are basically caused by increased intracranial pressure, and the cause of increased intracranial pressure in head trauma is intracranial hematoma. After head trauma, if no abnormality is found in the head CT after 72 hours, the condition is relatively stable. Within 72 hours, the patient’s condition may change at any time, so close observation of the patient’s consciousness, pupils, limb movements and vital signs is required within 72 hours. Patients who leave the hospital should also be closely monitored at home for headache, nausea, vomiting and impaired consciousness, and should seek immediate medical attention if their symptoms worsen.