I was 8 months into my healing when I got caught up in a long mountain bike ride. I couldn't get out of it (cut it short and return to my car) and "bonked" and it took everything I had in me to finish. Since then my PCS symptoms have returned and are even worse than at the time of my initial injury.

Does anyone know what happens in the brain to cause the symptoms to return? I know there increased blood flow, blood pressure, body heat, etc...

One thing I heard is that the jostling of my head during the ride may have caused the return of the pain. However, I am quite certain the physical exertion has more to do with it.

Any thoughts would be greatly appreciated.

Thanks.