Patients are usually fine when the top of their head is knocked down. Because the human parietal bone is very hard and thick, it can withstand a great deal of violence. As long as the violence is not particularly great and does not cause a fracture of the parietal bone, there is usually no serious cranial injury. Because of this position of the top, the force is transmitted to the base of the skull and is transmitted vertically, so it will not cause horizontal sliding of the brain tissue at the base of the frontal lobe or the base of the temporal lobe. It does not cause horizontal gliding and does not cause brain contusions or even the formation of intracerebral hematomas because of the unevenly positioned structure of the skull base. Therefore, a bump on the top of the head is usually not a big problem, but for insurance purposes, it is best to have a cranial CT examination to clarify the diagnosis.