After an external blow to the head, the first thing to do is to check whether there is any active bleeding, if there is active bleeding, you must immediately use a clean towel to stop the bleeding by pressure, and if necessary, send to the hospital for suturing. If the patient only produces simple dizziness, headache, no other symptoms, you can first go home to recuperate themselves, basically no big problem. However, if the headache, dizziness, and produce nausea, vomiting changes in condition, indicates that there may be intracranial hemorrhage, concussion, need to go to the hospital in time to review the head CT. if the injury after the condition of coma changes in the condition, which is even more serious, you must immediately go to the hospital for examination. If it is a large number of brain hemorrhage, or subdural hematoma, etc., even need to be treated by way of craniotomy. In some cases, the person may become unconscious and have dilated pupils directly after being struck by an external force, and it is possible that both respiration and heartbeat may stop at this time, indicating the patient’s state of death. Therefore, in the case of this kind of external blow, it is important to look at the specific situation and send the patient to the hospital for medical treatment if necessary.