The consequences of hitting the top of the head are mainly related to the magnitude of the impact. If the force of the impact is small, the patient may only show minor head discomfort. If the force increases a little more, the patient may experience concussion symptoms, such as dizziness, headache, nausea, vomiting, insomnia, anxiety, etc. after the injury. If the force of the impact is even greater, the patient may experience intracranial hemorrhage. If the patient has a small amount of intracranial hemorrhage, the symptoms may be similar to those of a concussion. If the amount of bleeding increases further, the patient is likely to show impaired consciousness. If the amount of bleeding further increases, it may affect the patient’s vital signs instability, and in serious cases, brain herniation may occur and endanger the patient’s life, so the most serious consequence of hitting the top of the head is to endanger the patient’s life, which is mainly related to the size of the impact force.