Brain damage is always permanent.
In some instances, the brain can repair itself. Whether a person recovers from a brain injury depends on the location and severity of the damage. A concussion, a typically mild and common type of brain injury, usually results in only temporary disruption of brain functions as long as there is adequate recovery time and no repeated injury. Even after more serious brain injury, such as stroke, research indicates that — especially with the help of therapy — the brain may be capable of developing new connections and “reroute” function through healthy areas.