Concussion | Overview


What is a concussion?

A concussion is a type of traumatic brain injury caused by a blow to the head. This type of brain injury can be common in athletes who play sports, or people who participate in recreational activities. It is also possible to get a concussion from a blow to the body if it causes sudden head movement.

You cannot see a concussion, and many of them are not treated or reported to a doctor. Signs and symptoms may show right away, or may not be noticed until days or weeks after the injury. A concussion can cause a variety of symptoms. Many times it doesn't involve a loss of consciousness.Concussion in sports can happen during drills, practices and games. Injuries during practice can be just as serious as those that happen during competition.

Funding and support for this material have been provided by the National Football League Foundation.


Centers for Disease Control and Prevention. Injury Prevention & Control: Traumatic Brain Injury. Accessed July 20, 2015

Centers for Disease Control and Prevention. Traumatic brain injury in the United States: epidemiology and rehabilitation.. Accessed July 20, 2015

National Institutes of Health. Traumatic brain injury (TBI): Condition Information. . Accessed July 21, 2015

Current Concepts In Concussion: Evaluation And Management by Scorza KA, Raleigh MF, O’Connor FG (Am Fam Physician )

Written by editorial staff

Reviewed/Updated: 08/15
Created: 09/00