Even what seems like a minor bump to the head can be serious, warns psychologist Gerard A. Gioia, PhD, of Children's National Medical Center. If there's any chance a child has a concussion, he wants you to take action:

  • Look for signs of concussion, such as changes in the child's behavior, thinking or physical functioning.

  • Record information — including the injury's cause; any loss of consciousness, memory loss or seizures; and previous concussions — to help with evaluation.

  • Seek immediate help from a health-care professional who can determine how serious the injury is.

  • Keep the child off the playing field until you get an OK from a health-care professional.

—R.A. Clay