How long does whiplash last and when does exhaustion from a concussion leave?

Hard to say: Concussion and whiplash injuries vary in severity. The pain from a whiplash will usually resolve in a few weeks and is best treated with early therapy and over the counter medications. Sometimes whiplash will last longer and in some cases the pain will become chronic. If symptoms of a concussion persist then you should check with your doctor to make sure nothing more serious is going on.