You do not decide what is wrong, only that somebody qualified has to look.
The default order, and when it flips
Athlete first, athletic trainer same day, then the parent by phone.
An emergency, self-harm, or risk at home does not run this order.
Six fields in the note, and a never-list
Date, what you saw, how long, what you changed, who knows, the ask.
Never write a diagnosis, a body, a plate, a cycle, or a teammate.