I also think that when you are that young your brain can heal a lot easier than someone in their 20's or 30's. My first concussion was around 15. with amneasia, so it was a good one. Second, third , forth, fifth between 18 and 23. But the sixth around the age of 29was the worst and even was flight 4 life to another hospital. It is was about a year after that where pcs was really starting to take a toll on me and still struggling 3 years later.