Below is some immediately useful information from the CDC's Heads Up program.
What is a Concussion?
A concussion is a type of traumatic brain injury—or TBI—caused by a bump, blow, or jolt to the head or by a hit to the body that causes the head and brain to move rapidly back and forth. This sudden movement can cause the brain to bounce around or twist in the skull, creating chemical changes in the brain and sometimes stretching and damaging brain cells.
Signs a player may have a concussion
Appears dazed or stunned
Is confused about assignment or position
Unsure of game, score or opponent
Loses consciousness (even briefly)
Shows behavior or personality changes
Can’t recall events prior to or after the hit or fall
Headache or pressure in the head
Nausea or vomiting
Balance problems or dizziness
Double or blurt vision
Sensitivity to light or noise
Concentration or memory problems
What a Coach should do if a Concussion is suspected
Remove the athlete from play
Inform the athlete’s parents/guardians of the possible concussion
Ensure the athlete is evaluated immediately by an appropriate health care professional
Allow the athlete to return to play only after an appropriate health care professional clears his or her return
IF YOU THINK YOU HAVE A CONCUSSION DON'T HIDE IT ~ REPORT IT ~ TAKE TIME TO RECOVER! IT'S BETTER TO MISS ONE GAME THAN THE WHOLE SEASON. IF YOU THINK A FRIEND/TEAMMATE HAS A CONCUSSION TELL YOUR COACH AND/OR YOUR PARENTS. STEPPING UP FOR YOUR FRIEND COULD SAVE THEIR LIFE.