If you ever hit your head really hard, but did not develop a bump on your head, you can still have a head injury. Contact a health care professional if needed. When we have an accident and hit our head hard, our brain can slosh to the other side of our skull and bang into it internally, shaking the brain out of its cage, the very spiderweb of nerves and connective tissue between your skull and your brain. It becomes impacted and will lead to some form of inflammation depending on how hard the in