CLEVELAND -- You remember that old 15-minute rule we would use to gauge whether our children had a concussion or not? If no symptoms show up in 15 minutes, put them back in the game or back on the playground.
Doctors now say to throw that rule out the window. Doctors from all over Cleveland met Wednesday to talk about concussions and how best to treat them.
They know symptoms can show up hours after the initial injury and a subsequent hit before a concussion heals can potentially cause permanent brain damage.
That's why it's key kids get total rest after a hard hit on the head.
"You may feel like they resolved it in 15 minutes but then, 3-4 hours later, you're not feeling so great again, so we know symptoms evolve over time," said Dr. Amanda Weiss-Kelly.
Concussions can happen to anyone, anywhere, at any time and for children, it can have a lasting impact.
"Kids who sit down and try to read will also exacerbate their systems. So for some kids, we need to limit their school work or take them out completely for a few days."
The best way to treat a concussion is rest with no physical activity or brain stimulation.