A concussion is a brain injury that is sustained as a result of a hit to the head, or serious injury.  Concussions have a wide variety of repercussions and symptoms. ​
Prevention:

Educate yourself about concussions so that you can be prepared if you sustain a head injury
  • Center for Disease Control and Prevention Concussions website
  • Mayo Clinic Concussions website 

Take preventative measures
  • Mayo Clinic website prevention guidelines
  • Traumatic Brain Injury website provides more information about prevention of brain injury  

Treatment:

Immediately stop activity, inform coaches and parents, see a doctor