When you suspect a head injury, what do you do? Ask the player if they need a trainer? The answer is “No.” If you suspect a head injury, get a trainer onto the field right away. It is possible that the player does not actually need a trainer but err on the side of caution. You would rather make a mistake for beckoning a trainer onto the field prematurely than not.
Below, you see a best practice example of a suspected head injury management. The referee immediately recognized there was a suspected head injury and beckoned trainers on. She also pointed at her own head to indicate to everyone that there was a suspected head injury.