Fortunately, the younger a person is, the more likely they will have a good recovery. As for the "wait two weeks after the headache goes away before sports," I would wait six weeks. I would also make sure all of his cognitive symptoms are gone before starting the six week clock.

Does he play video games? They can sometimes be a good indicator of cognitive symptoms/recovery. I would suggest some of the learning video games so he has to do more thinking to advance in the game. Ask his teacher to watch for symptoms, too. Does he daydream or appear spacey eyed? How does he react to stress, conflict, startle, etc.? These all can be signs of recovery or ongoing symptoms.

I had my first concussion when I was 8. Then I had a bad concussion at 10 years old. I had a serious personality change after the bad one. I had problems with depression, academics, maintaining friends, etc. From then on, I have been very reactive to even minor head bumps. At 46, I had to stop driving. I haven't played contact sports since I was 15 and developed seizures from heading a soccer ball.

Yes, you have a tough road ahead keeping him from a second impact.

How bad was his concussion? Did he lose consciousness? Did he have post traumatic amnesia? Loss of awareness of surroundings? Any other changes in behavior or skill set? Was he treated by just a pediatrician or family doctor? Does he have a helmet and agree to use it and wear it correctly? Many wear their helmet too far back and expose the forehead. I would encourage a helmet that covers more than just the top of the head. Snow board and skateboard helmets usually have better coverage. Just because he has a helmet on does not mean that he can bang his head. His brain is still fragile.

Regarding the headaches, you might try teaching him to relax and see if he can cause the headache to go away. If he can, this will be a very good skill to have. His headaches may come and go for quite some time. It is all different for each person. Hard to predict.

I am on this forum almost daily so I am here for your questions. I have had 13 concussions since 8 years old, most of them very minor, only one major concussion ( 30 minutes loss of consciousness).