Hello and welcome to the NeuroTalk Support Groups.
I'm very sorry that your son is dealing with post concussion syndrome. Please check on the
Traumatic Brain Injury & Post Concussion Syndrome Forum
There is a lot of information in the "Sticky" threads at the very top of that forum as well. They contain useful websites and other information that may be of help.
Feel free to just introduce yourself on a New Thread and I'm sure you'll find a lot of support from the members there.
take care.