Does everyone who hits their head get a brain injury?
In the most mild of cases, the brain still gets bruised in much the same way your leg might get bruised if you bump into a coffee table. However, the head and the brain is pretty resilient and it can usually handle that injury without much effort. Some times people can get a really tremendous blow on the head and it not have any external effect. Again, much depends of the location of the injury and the brain’s ability to compensate.
