A concussion is the most common form of head injury. Most concussions are caused by a blow to the head or sudden, uncontrolled, rapid movement of the head. A concussion may cause temporary symptoms but not permanent brain damage.
There are many possible causes for a concussion. Some common causes are bicycle accidents, automobile accidents, falls, and work-related injuries. Contact sports, especially football, are another common source of concussions. Some other sports that place a person at risk for concussions include:
Concussions are more common in an individual who has: