It's never just a bump on the head. As medical experts continue to research, the evidence overwhelmingly shows that a concussion isn't a momentary injury. The effects are different on each individual. Sometimes it is over quickly, but others experience side effects for months and even years later. The more serious the brain injury, the harder the recovery will be.
Everyone who goes through a medical procedure of any kind hopes that it goes well. However, there are always risks. There is always the possibility of a bad outcome