Whenever you are involved in an auto collision, you are at risk for a variety of injuries. While some of the injuries may be visible immediately, such as burns, bruises, cuts, and possibly even broken bones, some other injuries may not be so visible. A couple of examples of injuries that would fall into this category would be a concussion and a related injury known as post-concussion syndrome. If you or someone you care for has suffered, or you believe is suffering from a concussion and/or post-concussion syndrome after a collision, then there are several things that you will need to know.