Injuries to the head, which can often be attributed to heading of the ball or collision with another player, remain relatively common. In fact, five percent of all football injuries are concussions – a brain injury caused by a blow to the head.

Symptoms of a concussion include amnesia, memory loss, headache, confusion, poor coordination or vision difficulties. People who have suffered concussions do not necessarily lose consciousness.

Little can actually be done to treat a concussion, other than rest. However, it's crucial that a physician examine anyone who might have a concussion, so they can be sure no blood vessels in the brain were severed by the head injury.