Hyperbaric Oxygen Therapy CURED my son's post concussion syndrome. He did 12 sessions in a medical grade chamber--not the kind you can buy online or in a store. You have to find a naturopath or someone like that to administer the more pressurized oxygen. It's very expensive though!! That's the downside. But beg, borrow or do whatever to have this therapy if you're still suffering and nothing else has helped!! After 3 sessions he noticed significant improvement from brain fog and after 12 sessions was totally better. It's a miracle.