Second Impact Syndrome is a neurologicially devastating and potentially lethal condition due to swelling of the brain as a result of a second concussion occurring before complete recovery from the first.
A concussed athlete is more likely to sustain a repeat concussion with the greatest risk in the first 7 days.
Repeat concussions are slower to recover.
A history of more than 3 concussions is associated with long term cognitive impairment and emotional struggles.
High School athletes take longer to recover than older athletes.